Best Dog Food for Weight Loss (2026): 9 Vet-Reviewed Picks

If your dog is carrying extra pounds, you're far from alone. According to the Association for Pet Obesity Prevention (APOP), 59% of U.S. dogs are classified as overweight or obese — and obesity is now the most common preventable disease in dogs. The landmark 14-year Purina Life Span Study found that lean-fed dogs lived nearly 1.8 years longer, developed arthritis two years later, and maintained healthier blood glucose, blood pressure, and heart rates throughout their lives compared to their overweight littermates.

The right weight loss dog food is the single most effective intervention you can make. But with dozens of "healthy weight" and "light" formulas on the market — ranging from $2/day over-the-counter kibbles to $5+/day prescription veterinary diets — choosing the right one for your dog's degree of overweight is where most owners get stuck. This guide compares the 9 best weight loss dog foods available in July 2026, with verified Chewy pricing, veterinary-reviewed nutritional analysis, and a clear framework for matching the food to your dog's Body Condition Score (BCS).

The 9 Best Weight Loss Dog Foods Compared

We evaluated each formula against five criteria that veterinary nutritionists consistently recommend for weight management: high protein (25%+) to preserve lean muscle, low fat (under 14%), high fiber (5-10%) for satiety, reduced calories per cup (250-320 kcal vs 350-400 in regular food), and manufacturer research backing (WSAVA compliance). All prices below are verified from Chewy.com in July 2026 and reflect the largest standard bag size.

A quick note on protein percentages: The numbers above are on an as-fed basis from the guaranteed analysis. To compare on a dry matter basis (which removes water content for apples-to-apples comparison), multiply protein by roughly 1.1 for dry kibble. A 28.6% protein kibble is about 31.5% dry matter protein — well above the 25% minimum for weight loss.

1. Hill's Science Diet Adult Perfect Weight — Best Overall

Hill's Science Diet Adult Perfect Weight is the most vet-recommended over-the-counter weight loss food, and for good reason: it's one of the few OTC formulas with published clinical trial data showing that over 70% of dogs lost weight within 10 weeks of feeding. The formula achieves this through a combination of high protein (28.6%) to preserve muscle, low fat (11.2%) to reduce caloric density, and high fiber (10.4%) — the highest fiber content of any food on this list — to keep dogs feeling full between meals.

At 284 kcal per cup, it's about 20% lower in calories than a standard adult maintenance food, which means you can feed a similar volume without the same caloric hit. The protein-to-fat ratio of roughly 2.5:1 is optimal for weight loss — high enough to signal muscle preservation during fat loss, low enough to create a meaningful calorie deficit. The formula is also available in Small & Mini and Large Breed variants, so you can match the kibble size to your dog.

Best for: Dogs 10-20% above their ideal weight. The clinical evidence makes this the safest first choice for a vet who wants to start with an OTC formula before going prescription.

When to avoid: Dogs with diagnosed food allergies to chicken (chicken is the primary protein). Dogs with a history of pancreatitis should consult their vet — while 11.2% fat is relatively low, some pancreatitis-prone dogs need fat under 8%. Not appropriate for puppies or pregnant/nursing dogs.

2. Purina Pro Plan Adult Weight Management — Best High-Protein

Purina Pro Plan Adult Weight Management is the high-protein alternative for owners who want weight loss without sacrificing the protein content their dog is used to. At 27% protein and 9% fat — the lowest fat content on this list alongside the Royal Canin formulas — it delivers a protein-to-fat ratio of 3:1, the highest of any OTC food here. The Shredded Blend format combines crunchy kibble with meaty shreds, which many dogs find more palatable than uniform kibble — useful when you're reducing portions.

At 330 kcal per cup, it's higher in caloric density than Hill's Perfect Weight, but the high protein and fiber content create strong satiety. This means you feed slightly less volume but the dog feels equally full. Purina is one of the five brands that meet WSAVA manufacturer guidelines — meaning they employ full-time veterinary nutritionists, conduct peer-reviewed research, and own their manufacturing facilities. This matters: weight loss food that hasn't been feeding-trial tested risks nutritional deficiencies when fed at reduced portions for months.

Best for: Active dogs who need higher protein to maintain muscle during weight loss, and dogs who turn their nose up at uniform kibble. The 34-lb bag at $77.48 ($2.28/lb) is also the best price-per-pound on this list among WSAVA-compliant brands.

When to avoid: Dogs who need the absolute lowest calorie density per cup — Hill's Perfect Weight is lower at 284 kcal/cup. Dogs with chicken sensitivity (chicken is the first ingredient). The 9% fat is excellent for weight loss but still too high for dogs with a strict low-fat requirement (under 7%, typically for chronic pancreatitis).

3. Royal Canin Veterinary Diet Satiety Support — Best Prescription

Royal Canin Satiety Support is the prescription standard for canine weight loss — and "Satiety" is the key word. Royal Canin's published clinical research shows that 97% of dogs lost weight within 3 months on this formula, with the unique feature of significantly reducing begging behavior between meals. This is achieved through a combination of extremely high fiber (13% — the highest on this list by a wide margin), high protein (30%), and specific amino acid profiles that promote satiety signaling.

At 9% fat and roughly 280 kcal per cup, it's nutritionally dense for weight loss while keeping protein very high to preserve muscle mass during aggressive weight reduction. The 13% fiber content is the standout — that's roughly double the fiber of Hill's Perfect Weight and more than triple a standard maintenance food. This is what makes the food work for dogs who've failed on OTC formulas: the physical fullness from fiber is what reduces begging and over-eating behaviors that owners struggle to manage.

Best for: Obese dogs (20%+ above ideal weight), dogs who've failed to lose weight on OTC formulas despite owner compliance, and dogs with stubborn begging behaviors that undermine portion control. Requires veterinary authorization — your vet needs to confirm there's no underlying cause of weight gain (hypothyroidism, Cushing's disease) before starting a therapeutic diet.

When to avoid: Dogs who only need to lose 5-10% of body weight — Royal Canin's OTC Weight Care formula (see #9) is more appropriate and doesn't require a prescription. Dogs with a known allergy to Royal Canin's protein sources. The $128.99 price tag for 26.4 lbs ($4.89/lb) makes it the most expensive dry food on this list — appropriate for clinical weight loss, overkill for mild weight management.

4. Wellness CORE Grain-Free Reduced Fat — Best Grain-Free

Wellness CORE Grain-Free Reduced Fat is the highest-protein food on this list at 33% — a level typically reserved for working and sporting dogs, not weight loss formulas. The logic is simple: maximum protein preservation during caloric restriction. At 9% fat and ~340 kcal per cup, it's not the lowest-calorie option, but the protein-to-fat ratio of 3.7:1 is excellent for maintaining lean body mass while the dog loses fat.

The grain-free formulation uses turkey as the lead protein with lentils and peas as the primary carbohydrate sources. Wellness includes guaranteed probiotics, omega fatty acids from flaxseed and chicken fat, and glucosamine and chondroitin for joint support — a thoughtful addition given that overweight dogs are at significantly elevated risk for arthritis and joint stress.

Best for: Dogs whose owners prefer grain-free formulas and dogs who need to maintain maximum muscle mass during weight loss — working breeds, large-breed dogs, and dogs with naturally lower body fat who've become overweight due to reduced activity. The 26-lb bag at $79.98 ($3.08/lb) is mid-range pricing.

When to avoid: The FDA investigated a possible link between grain-free diets high in peas, lentils, and potatoes and dilated cardiomyopathy (DCM) in dogs. While no definitive causal link was established, many veterinarians now recommend grain-inclusive formulas as the safer default. If your dog has no confirmed grain sensitivity, Hill's Perfect Weight or Purina Pro Plan are generally considered safer choices. Discuss with your vet if you have a breed predisposed to DCM (Doberman, Boxer, Great Dane, Cocker Spaniel).

5. Blue Buffalo True Solutions Weight Control — Best Natural Option

Blue Buffalo True Solutions Weight Control (also marketed as "Fit & Healthy") is the budget-friendly natural-ingredient option. At $56.99 for a 20-lb bag, it's the lowest absolute price on this list, though the per-pound cost ($2.85/lb) is similar to Hill's. The formula features deboned chicken as the first ingredient, with oatmeal, barley, and brown rice as the grain sources — a grain-inclusive formulation that sidesteps the DCM concerns around grain-free diets.

At 25% protein and 9% fat, the nutritional profile is solid for weight loss — the protein is on the lower end but still above the 25% minimum, and the fat is competitive with Hill's and Purina. Blue Buffalo includes their "LifeSource Bits" — a blend of antioxidants, vitamins, and minerals — and L-carnitine, an amino acid that plays a role in fat metabolism. The practical difference L-carnitine makes in canine weight loss is modest, but it's a reasonable inclusion.

Best for: Budget-conscious owners who want a natural-ingredient formula without the grain-free DCM concerns. The 20-lb bag is a good size for small and medium dogs who'll finish it before it goes stale.

When to avoid: Blue Buffalo does not meet WSAVA manufacturer guidelines — they don't employ full-time veterinary nutritionists or conduct the same level of feeding trials as Hill's, Purina, or Royal Canin. This doesn't mean the food is unsafe, but for a weight loss diet fed at reduced portions for months, the research backing matters more. Dogs with severe obesity or medical conditions are better served by WSAVA-compliant brands.

6. Nulo Freestyle Adult Trim Cod & Lentils — Best for Small Breeds

Nulo Freestyle Adult Trim is a grain-free formula with a unique protein profile — cod (fish) as the lead ingredient, which makes it an excellent choice for dogs with chicken or beef sensitivities. At 30% protein and 9% fat with 6% fiber, the macros are well-balanced for weight loss, and the low-glycemic lentil carbohydrate source helps maintain stable blood sugar — important for overweight dogs who may be insulin-resistant.

Nulo includes their proprietary BC30 probiotic (Ganaden BC30), L-carnitine for fat metabolism, and omega-3 fatty acids from fish. The smaller kibble size makes it particularly suitable for small breeds — small dogs (under 20 lbs) are disproportionately affected by obesity because owners underestimate how few calories they need. A 10-lb dog needs only 200-300 calories per day, and a single extra tablespoon of food can represent a meaningful caloric surplus.

Best for: Small and toy breeds, dogs with chicken or beef sensitivities, and owners who want a fish-based weight loss formula. The probiotic inclusion supports digestive health during the dietary transition.

When to avoid: Same DCM caveat as all grain-free formulas — discuss with your vet if you have a breed predisposed to DCM. Large breeds may find the kibble size too small. Nulo does not meet WSAVA guidelines, so for dogs with medical complications, a WSAVA-compliant brand is preferable.

7. Hill's Science Diet Perfect Weight Wet — Best for Satiety

The wet version of Hill's Perfect Weight deserves separate consideration because of the satiety advantage. Wet dog food is approximately 75% water, which means a can of food occupies significantly more volume in the stomach than the same calories of dry kibble. For dogs who act hungry between meals — the #1 reason weight loss plans fail — wet food creates a physical feeling of fullness that dry kibble simply can't match.

At 299 kcal per 12.5-oz can and 23% protein with 8% fat, the nutritional profile supports weight loss while the high moisture content drives satiety. Many vets recommend a hybrid approach: feed a portion of dry kibble for convenience and cost, supplemented with wet food at one meal to boost fullness. For a 30-lb dog, this might look like 3/4 cup dry plus 1/2 can wet per meal, twice daily.

Best for: Dogs who beg constantly between meals despite reduced portions — the volume from water content is the most effective non-pharmaceutical satiety intervention. Picky eaters who resist new dry formulas. Senior dogs who've lost appetite and need palatability plus weight management simultaneously.

When to avoid: Cost — the wet version runs about $3.00/day for a 30-lb dog versus $2.10 for the dry. Dogs prone to dental issues benefit more from the abrasive action of dry kibble. Once opened, wet food must be refrigerated and used within 2-3 days, which adds storage complexity.

8. The Farmer's Dog — Best Fresh Food

The Farmer's Dog takes a fundamentally different approach to weight loss: rather than reformulating the food, they portion-control it for you. When you sign up, you provide your dog's current weight, target weight, age, breed, and activity level. The company calculates the exact daily caloric requirement for weight loss and sends pre-portioned packets — one per meal, no measuring cups required. This eliminates the single biggest source of weight loss failure: owners unknowingly overfeeding.

The food itself is gently cooked fresh food with human-grade ingredients — turkey, beef, chicken, or pork with vegetables like sweet potato, spinach, and broccoli. Protein content runs 10-16% as-fed (about 40-50% dry matter, the highest of any food on this list), with fat content moderate and appropriate for weight loss. The fresh format retains more moisture and nutrients than extruded kibble, which may improve digestibility.

The major trade-off is cost. At roughly $6.50/day for a 30-lb dog (ranges from $2.31/day for small dogs to $26.77/day for very large dogs), it's 3x the cost of premium dry weight loss food. But the portion-control model is genuinely effective: by removing the decision-making from the owner, it addresses the compliance problem that undermines most weight loss attempts. For owners who can afford it, this is arguably the most reliable approach.

Best for: Owners who struggle with portion measurement (most do), picky dogs, and those who can afford premium pricing. The pre-portioned model eliminates the "just a little extra" behavior that adds 10-20% to daily intake.

When to avoid: Budget — at $6.50/day, a year of The Farmer's Dog costs roughly $2,375, versus $765 for Hill's Perfect Weight dry. Multi-dog households where the cost multiplies. The food requires freezer storage and thawing time, which adds planning. Not a WSAVA-compliant manufacturer, so consult your vet for dogs with medical conditions.

9. Royal Canin Weight Care (OTC) — Best Maintenance Option

Royal Canin Weight Care is the over-the-counter sibling of the prescription Satiety Support — it uses similar nutritional principles (high protein, low fat, moderate-high fiber) but without the veterinary authorization requirement. At 28% protein and 9% fat with roughly 290 kcal per cup, it's a solid maintenance-weight formula for dogs who've completed a weight loss program and need to hold steady, or for dogs who are only 5-10% above ideal weight.

Royal Canin's breed-specific formulations are a genuine differentiator — they offer Weight Care variants tailored to small, medium, and large breeds, with kibble size and shape matched to jaw morphology. This isn't just marketing: the kibble texture and size affect how thoroughly a dog chews, which influences both digestion and dental health. For dogs who "inhale" their food (a common issue in fast-eating breeds like Beagles and Labs), the larger kibble size forces slower eating, which improves satiety signaling.

Best for: Weight maintenance after reaching target weight — the bridge between active weight loss food and a regular maintenance diet. Dogs who are only mildly overweight (5-10% above ideal). Breed-specific kibble sizing for dogs with jaw or dental considerations.

When to avoid: Active weight loss for obese dogs — the prescription Satiety Support is more effective for dogs who need to lose more than 15% of body weight. The 13-lb bag at $49.08 ($3.78/lb) is relatively expensive per pound, though the smaller bag size suits owners who don't want to store large quantities.

How to Tell If Your Dog Is Actually Overweight: The BCS Chart

Before switching foods, you need to know whether your dog is actually overweight — and by how much. Veterinarians use the 9-point Body Condition Score (BCS) system, which is far more accurate than weight alone because ideal weight varies enormously by breed and frame. Here's how to assess your dog:

The Calorie Math: How Much to Feed for Weight Loss

This is where most weight loss plans fail. The feeding guidelines on the bag are based on maintenance calories for a dog at ideal weight — not weight loss calories for your currently overweight dog. If you follow the bag, you'll likely maintain your dog's current weight (or keep them gaining). Here's the veterinary formula:

Step 1: Calculate Resting Energy Requirement (RER)

RER = 70 × (body weight in kg)^0.75

For dogs between 2 kg and 45 kg, the simplified formula works: RER = 30 × (body weight in kg) + 70

Step 2: Apply the weight loss factor

For weight loss, feed 1.0 × RER (the RER itself, not a maintenance multiplier). This is the key insight most owners miss — weight loss calories are approximately equal to resting energy requirement, not maintenance.

Step 3: Subtract treats. Treats should make up no more than 10% of daily calories. For a 40-lb dog on a 540 kcal weight loss plan, that's 54 kcal for treats — roughly 3-4 small training treats or one dental chew. Subtract these from the daily total.

Step 4: Split into meals. Feed 2-3 meals per day rather than one large meal. This improves metabolism, reduces begging, and prevents the blood sugar spikes that drive hunger.

When OTC Isn't Enough: The Prescription Threshold

A common question is: when do you move from an over-the-counter weight food to a prescription veterinary diet? The general veterinary consensus, as articulated by Dr. Churchill and others, is:

OTC weight foods are designed to reduce calories while maintaining complete nutrition — they work well for dogs who've drifted 10-20% above ideal weight. But when a dog is 20% or more overweight, the metabolic adaptations that have occurred (insulin resistance, chronic inflammation, altered hunger hormone signaling) often require the more aggressive nutritional intervention that prescription diets provide. Prescription diets also allow your vet to monitor for and manage complications like hepatic lipidosis (fatty liver), which can occur with rapid weight loss in obese dogs.

The Health Stakes: Why This Matters

Weight loss isn't cosmetic for dogs — it's a direct investment in lifespan and quality of life. The 14-year Purina Life Span Study provided the most compelling evidence: Labrador Retrievers fed to maintain lean body condition lived a median of 1.8 years longer than their free-fed littermates, developed osteoarthritis a median of 3 years later, and required significantly less medical intervention for age-related diseases throughout their lives.

The conditions obesity predisposes dogs to include:

• Osteoarthritis: The #1 consequence. Extra weight multiplies joint stress with every step — a 20% overweight dog puts 20%+ more force on every joint, accelerating cartilage breakdown. Banfield reported a 158% increase in arthritis diagnoses in dogs over a decade.
• Diabetes mellitus: Obese dogs are significantly more likely to develop insulin resistance and type-2-like diabetes, requiring twice-daily insulin injections and blood glucose monitoring.
• Cancer: Chronic inflammation from excess fat tissue is associated with elevated cancer risk, particularly mammary and bladder cancers.
• Heart disease & hypertension: Excess weight strains the cardiovascular system and is linked to elevated blood pressure.
• Urinary bladder stones: Overweight dogs have higher rates of calcium oxalate uroliths.
• Anesthetic complications: Obese dogs are higher-risk candidates for anesthesia — relevant because many orthopedic and dental procedures require sedation.

VCA Animal Hospitals notes that being even moderately overweight can reduce a dog's life expectancy by nearly two years. For a breed with a typical 12-year lifespan, that's losing roughly 15% of their life to preventable obesity.

How to Transition to a Weight Loss Food Safely

Sudden diet changes cause gastrointestinal upset — diarrhea, vomiting, gas — which owners often misinterpret as the food "not working" or the dog rejecting it. The standard veterinary transition protocol is 7-10 days of gradual mixing:

If your dog has a sensitive stomach or a history of GI issues, extend this to 10-14 days. Probiotic supplements (like Purina's FortiFlora) can ease the transition by supporting the gut microbiome during the dietary change.

Critical: During transition, do not reduce the total portion size yet. The goal of the first week is to get the dog accustomed to the new food at their current volume. Once fully transitioned (day 7+), then reduce to the calculated weight loss portion. Trying to change the food AND reduce the amount simultaneously is a recipe for begging, food refusal, and owner discouragement.

Common Mistakes That Sabotage Canine Weight Loss

• Following the bag's feeding guidelines. These are maintenance recommendations, not weight loss recommendations. Always calculate RER and feed to that target, not the chart on the bag. This is the single most common error.
• Not counting treats. A Milk-Bone treat contains 125 kcal — that's 23% of a 40-lb dog's entire weight loss daily target. Two treats a day can completely undermine a calorie deficit. Subtract every treat from the daily total.
• Free-feeding. Leaving food out all day makes it impossible to track intake and removes the metabolic benefit of scheduled meals. Multiple dogs in the home make this worse — you can't tell who ate what.
• No weigh-ins. "Eyeballing" weight loss doesn't work. Weigh your dog every 2-4 weeks at the vet's scale (most allow free walk-in use) or invest in a pet-specific home scale. Track the trend, not the day-to-day fluctuations.
• Expecting overnight results. Safe weight loss is 1-2% of body weight per week — a 40-lb dog loses 0.4-0.8 lbs per week. Over 3 months, that's 5-10 lbs, which is significant but not dramatic visually. Trust the scale, not the mirror.
• Switching foods too quickly. If you don't see results in 2 weeks, don't switch brands — weight loss takes 6-8 weeks to evaluate properly. Switching brands resets the clock and prevents you from knowing which food actually works.
• Ignoring exercise. Diet drives 70-80% of weight loss, but the remaining 20-30% matters. Even a daily 20-minute walk makes a meaningful difference, and for arthritic dogs, swimming is an excellent low-impact option.

Frequently Asked Questions

What is the best dog food for weight loss?

For most overweight dogs, Hill's Science Diet Adult Perfect Weight is the vet-recommended starting point. It's the only OTC weight loss food with published clinical trial data showing 70%+ of dogs lost weight within 10 weeks, it meets WSAVA manufacturer guidelines, and at ~$2.10/day for a 30-lb dog, it's affordable. For obese dogs (20%+ above ideal weight), Royal Canin Veterinary Diet Satiety Support is the prescription standard — 97% of dogs lost weight within 3 months in Royal Canin's clinical research. Your vet should help determine which is appropriate based on your dog's BCS.

How much should I feed my dog for weight loss?

Calculate your dog's Resting Energy Requirement (RER) using the formula 70 × (body weight in kg)^0.75, then feed approximately 1.0 × RER for weight loss. For a 40-lb dog, that's roughly 540 calories per day — about 1 3/4 cups of Hill's Perfect Weight. This is significantly less than the bag's feeding guidelines, which are maintenance recommendations. Split into 2-3 meals, subtract treat calories (max 10% of daily total), and weigh your dog every 2-4 weeks to adjust. Target 1-2% body weight loss per week.

How long does it take for a dog to lose weight on weight loss food?

A safe rate is 1-2% of body weight per week. A 40-pound dog should lose about 0.4-0.8 pounds per week, reaching a target weight in 3-6 months. Hill's Perfect Weight shows visible results within 10 weeks in clinical trials. Faster weight loss risks muscle wasting, nutritional deficiencies, and in obese dogs, hepatic lipidosis (fatty liver disease). If weight loss plateaus after initial success, reduce portions by 5-10% — metabolic adaptation slows progress over time.

Do I need a prescription for weight loss dog food?

No — for most dogs. OTC weight management foods like Hill's Perfect Weight, Purina Pro Plan Weight Management, and Wellness CORE Reduced Fat are available without a prescription. However, if your dog is more than 15-20% above their ideal weight, has failed to lose weight on OTC formulas despite 6-8 weeks of compliance, or has medical conditions like diabetes or arthritis that complicate weight loss, your vet may recommend a prescription veterinary diet like Royal Canin Satiety Support or Hill's Prescription Diet r/d. These require veterinary authorization because they're formulated for clinical weight management under veterinary supervision.

Is wet or dry dog food better for weight loss?

Wet food can be better for weight loss because its high water content (about 75%) creates a feeling of fullness with fewer calories per volume — increased satiety means less begging. However, dry weight-loss formulas have been clinically tested and are more cost-effective and convenient. A combination approach — mixing wet and dry — often works well: feed dry for cost and dental benefits, supplemented with wet at one meal for satiety. The key factor is total daily calories, not the food format. If your dog will only eat dry, that's fine — just calculate portions precisely.

Can I just feed my dog less of their regular food for weight loss?

For dogs only 5-10% overweight, reducing portions of a regular adult maintenance food by 10-20% may work. However, for dogs more than 10% overweight, this approach risks nutrient deficiencies — you're cutting calories but also proportionally cutting protein, vitamins, and minerals. Weight management formulas are specifically designed to reduce calories while maintaining protein and nutrient levels, which preserves muscle mass during fat loss. The Purina Life Span Study and other research show that maintaining protein intake during caloric restriction is critical — simply cutting portions of regular food doesn't achieve this.

What should I look for in a weight loss dog food?

Look for high protein (25%+), low fat (under 12-14%), high fiber (5-10%), and reduced calories per cup (250-320 kcal/cup versus 350-400 in regular food). The food should meet AAFCO standards for adult maintenance, be from a WSAVA-compliant manufacturer (Purina, Hill's, Royal Canin, Iams, Eukanuba) when possible, and ideally have published clinical trial data. Your vet's input is essential — they'll help match the food to your dog's BCS, medical history, and any breed-specific considerations. Avoid foods with vague marketing terms like "light" or "healthy weight" without published guaranteed analysis — the nutritional profile matters more than the label.

The Bottom Line

Canine obesity is the most common preventable disease in dogs — affecting 59% of U.S. dogs — and it's directly shortening lives by nearly two years. The good news is that weight loss is one of the most treatable conditions in veterinary medicine, and the right food makes it manageable. The Purina Life Span Study proved that even modest weight management extends lifespan, delays arthritis by years, and improves metabolic health throughout life.

Match the food to the severity: Hill's Perfect Weight or Purina Pro Plan Weight Management for dogs 10-20% overweight, Royal Canin Satiety Support for obese dogs 20%+ above ideal, and The Farmer's Dog if you want portion control handled for you. Calculate calories using RER (not the bag guidelines), transition over 7-10 days, weigh every 2-4 weeks, and adjust portions based on the actual rate of loss. The formula is simple; the execution requires consistency.

Your dog doesn't need to be perfect — they need to trend in the right direction. A 40-lb dog that loses 0.5 lbs per week will be at ideal weight in 4-6 months, adding years to their life. Start with a BCS check, pick the right food, and commit to the plan. The tail wags are worth it.