Bully Max and Purina Pro Plan Sport are both high-protein, high-fat dry foods made for active dogs, and on paper they start in the same place: the best-known formula from each brand is a 30/20 (30% protein, 20% fat). The biggest published differences are calories per cup, the ingredient lists, and how each brand states it meets AAFCO standards. This side-by-side comparison uses each company's own published numbers as of October 2026, so you can decide which food fits your dog.

The Short Answer: Which Dog Each Food May Suit

There is no single “winner” for every dog. Both brands publish complete, balanced, high-protein foods for athletic dogs. What separates them is how much energy is in each cup, which proteins they use and what range of formulas each brand offers.

• Pro Plan Sport may suit owners who want a food whose label cites AAFCO feeding tests, a choice of several protein and fat levels (including a 26/16 for less intense activity), a salmon-first option, and large bags sold in many stores.
• Bully Max may suit owners of hard keepers, bully breeds and working dogs who want more calories per cup, a chicken-free 30/20 option (Beef), a 600 kcal/cup formula for dogs that need even more, and a family-owned, made-in-USA brand with zero recalls.

If your dog is healthy, holding a good weight and doing well on the food it eats now, there is no need to switch. If your dog struggles to keep weight on, eats a large volume to hold condition, or needs a chicken-free option, read on.

Bully Max vs Purina Pro Plan Sport: Side-by-Side Comparison

The table compares the most-searched Pro Plan Sport formula with the three Bully Max performance foods. Every number comes from the manufacturer's own published label or product page.

Purina figures as of October 2026 from the Pro Plan Sport 30/20 Chicken & Rice product page on purina.com (calories, ingredients, named extras) and the same formula on shop.purina.com (guaranteed analysis and AAFCO statement). Bully Max figures from Bully Max product pages. Guaranteed analysis values are as-fed minimums.

Purina Pro Plan Sport: What the Label Says

Pro Plan Sport is Purina's line for active and sporting dogs. Purina describes it as food for dogs that are “working, competing, or out in the field” (Pro Plan Sport line page). The line is grouped into Sport Performance 30/20 formulas, Sport Active formulas and Sport Puppy Development formulas.

Pro Plan Sport Performance 30/20 Chicken & Rice

This is the formula most people mean when they search “Purina Pro Plan Sport.” Purina's product page names it Pro Plan All Ages Sport Performance 30/20 Chicken & Rice Formula and lists:

• Guaranteed analysis: crude protein 30.0% min, crude fat 20.0% min, crude fiber 3.0% max, moisture 12.0% max, with EPA and DHA each at 0.12% min (shop.purina.com).
• Calories: 4,390 kcal/kg and 484 kcal/cup (purina.com).
• First ingredient: chicken. The list on purina.com also includes rice, beef fat preserved with mixed-tocopherols, poultry by-product meal, whole grain corn, corn germ meal, dried egg product, fish meal and fish oil (purina.com).
• AAFCO statement: “Animal feeding tests using AAFCO procedures substantiate that Pro Plan Performance 30/20 Chicken & Rice Formula provides complete and balanced nutrition for all life stages, including growth of large sized dogs (70 lb. or more as an adult)” (shop.purina.com).
• What Purina highlights: 30% protein and 20% fat to fuel metabolic needs and maintain lean muscle, amino acids to nourish muscles, and EPA plus glucosamine to help support joint health (purina.com).

Other Pro Plan Sport Formulas

Sources, as of October 2026: 30/20 Chicken & Rice, 30/20 Salmon & Rice and Sport Active 26/16 label (PDF), all on purina.com. Formulas and labels can change; check the current bag.

Where Pro Plan Sport Is Strong

A fair comparison has to give credit where it's due. Based on Purina's own published information, Pro Plan Sport has real strengths:

• Feeding-test substantiation. The 30/20 Chicken & Rice label states its complete-and-balanced claim is backed by animal feeding tests using AAFCO procedures, for all life stages including large-breed growth.
• Guaranteed omega-3s. EPA and DHA minimums are printed in the guaranteed analysis.
• Choice of energy levels. A 26/16 for active dogs, two 30/20 formulas for hard-working dogs, plus puppy formulas.
• A salmon-first 30/20. The Salmon & Rice formula lists 534 kcal/cup with salmon as the first ingredient.
• Availability. Pro Plan Sport is sold in large bags (up to 50 lb) and at many retailers.

Bully Max Performance Foods: What the Label Says

Bully Max is a family-owned U.S. company founded in 2009. Our foods are high-performance, meat-based nutrition, made in the USA, and every batch is triple tested for safety. We have zero recalls. Every Bully Max dog food is suitable for large-breed dogs, including large-breed puppies, under AAFCO guidelines. Here are the three formulas that compete most directly with Pro Plan Sport.

Bully Max 30/20 High Protein Chicken

Bully Max 30/20 High Protein matches Pro Plan Sport 30/20 on protein and fat: 30% and 20%. The difference is energy density. At 535 calories per cup, it has 51 more calories per cup than the 484 kcal/cup Purina lists for Pro Plan Sport 30/20 Chicken & Rice, about 10% more. For a dog that needs a lot of fuel, that means a slightly smaller scoop for the same calories. It also includes TruMune to support digestion and immune health. Learn more about the benefits of TruMune in dog food.

If your dog is doing well on a 30/20 and you want the same protein and fat with more calories per cup, this is the one to try.

TRY BULLY MAX 30/20 HIGH PROTEIN CHICKEN

30% protein, 20% fat and 535 calories per cup of meat-based nutrition, with TruMune to support digestion and immune health.

$55.97 · 15 lb

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Bully Max PRO Series 31/25 High Calorie

Some dogs need more than any 30/20 delivers: working dogs, sport dogs in heavy training, and hard keepers that drop weight easily. PRO Series 31/25 High Calorie has 31% protein, 25% fat and 600 calories per cup. That's the highest calorie density of any food in this comparison. The Pro Plan Sport formulas in this comparison top out at 30% protein and 20% fat, so PRO is the closer fit for a dog that needs more energy than a 30/20 provides. Our guide to high-calorie dog food explains which dogs need it.

For working, sport and hard-keeper dogs that need the most calories per cup:

FUEL HARD WORK WITH BULLY MAX PRO SERIES 31/25

High-calorie performance nutrition with 31% protein, 25% fat, and 600 calories per cup for working and sport dogs.

$79.97 · 16 lb

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Bully Max 30/20 High Protein Beef (Chicken-Free)

Both 30/20 Pro Plan Sport formulas in the table include poultry ingredients on the label. If your dog does better without chicken, Bully Max 30/20 High Protein Beef keeps the 30/20 numbers with no chicken in the ingredient list. Beef meal is the first ingredient, it has 530 calories per cup, and it includes 10 million CFU/lb of probiotics. If you suspect a food sensitivity, work with your vet before changing foods. See our guide to chicken-free dog food.

For active dogs that need a chicken-free 30/20:

TRY BULLY MAX 30/20 BEEF, CHICKEN-FREE

Chicken-free, meat-based nutrition with 30% protein, 20% fat, and 530 calories per cup for strength and energy.

$55.97 · 15 lb

ADD TO CART

Calories per Cup: Why It Matters for Active Dogs

Protein and fat percentages get the attention, but calories per cup decide how much your dog actually eats. Two foods with the same 30/20 numbers can still differ in energy per scoop. A more calorie-dense food lets a hard-working dog or a hard keeper meet its needs without a huge bowl. A less dense food gives a dog that gains easily more volume for the same calories.

Here is what that looks like for an active adult dog. These are estimates for comparison only.

Estimates only: resting energy (70 × body weight in kg^0.75) times 2.0 for an active adult, divided by each food's published calories per cup. Dogs in hard training or working long days can need more. Always start from the feeding guide on the bag you buy, then adjust by body condition.

Whatever you feed, watch your dog, not just the chart. You should be able to feel the ribs with light pressure and see a waist. Adjust by about 10% at a time. The dog food calculator runs these numbers for your dog, and how much should I feed my dog explains the method. If your dog is losing weight without a clear reason, see your vet before you change foods.

Protein and Fat: Reading the 30/20 Numbers

“30/20” is shorthand for the guaranteed analysis: at least 30% crude protein and at least 20% crude fat. Both brands use it the same way, and both numbers are as-fed minimums, so the food may contain a little more. A few things worth knowing when you compare:

• Moisture affects the percentages. Guaranteed analysis is measured with the moisture in the food. Purina lists 12% max moisture for Pro Plan Sport 30/20. When moisture differs between foods, compare them on a dry-matter basis or just compare calories per cup.
• Fat drives calories. Fat has more than twice the calories of protein or carbohydrate per gram. That is why PRO 31/25, with 25% fat, reaches 600 kcal/cup.
• Protein source matters too. The percentage tells you how much protein, not where it comes from. Read the ingredient list to see the main protein sources.

For a deeper look, read the truth about protein content on dog food labels and the best protein sources for dogs.

AAFCO Statements: Feeding Tests vs Nutrient Profiles

Every complete dog food sold in the U.S. carries a nutritional adequacy statement. AAFCO allows two main ways to support it: formulating the food to meet the AAFCO Dog Food Nutrient Profiles, or running animal feeding tests using AAFCO procedures. Both routes result in a food that can be labeled complete and balanced for the life stage named.

• Pro Plan Sport 30/20 Chicken & Rice: Purina states its adequacy is substantiated by animal feeding tests using AAFCO procedures, for all life stages including growth of large sized dogs (70 lb or more as an adult). That is a genuine strength.
• Bully Max: every Bully Max dog food is suitable for large-breed dogs, including large-breed puppies, under AAFCO guidelines. Bully Max 30/20 Beef is formulated to meet the AAFCO Dog Food Nutrient Profiles, including growth of large size dogs (70 lb or more as an adult).

Our guide to AAFCO labels and what really matters explains how to read these statements on any bag.

Which Dogs Each Food May Suit

Pro Plan Sport may be the better fit if

• You want a label that cites AAFCO feeding tests.
• Your dog does well on fish and you want a salmon-first 30/20.
• Your dog is active but gains weight easily, and a 26/16 fits better than a 30/20.
• You need very large bags or want to buy in local stores.
• Your dog is already thriving on it. A food that works is worth keeping.

Bully Max may be the better fit if

• Your dog is a hard keeper and needs more calories per cup to “put on weight” or “keep weight on,” as our customers describe it.
• Your dog works, pulls, trains for protection sports or runs hard, and needs more than a 30/20 delivers (PRO 31/25, 600 kcal/cup).
• You want a chicken-free 30/20 (Beef).
• You own a bully breed or pit bull. American Bullies and pit bulls make up nearly two-thirds of our customers' dogs, and our sponsor dogs compete in weight pull, conformation and protection sports.
• You prefer a family-owned, made-in-USA brand with zero recalls and every batch triple tested for safety.

For more on fueling dogs that work for a living, see the best dog food for working and sport dogs. If your dog is underweight, start with how to help your dog gain healthy weight.

Why Owners Choose Bully Max

Proof comes first. Bully Max has over 50,000 5/5 reviews, a Dog Food Advisor 5/5 rating, and has served millions of dogs. In our post-purchase survey of about 2,400 buyers, the most common reason for choosing Bully Max was reviews and visible results (about 20%). Protein, calories and ingredients (about 14%) and quality and trust, including made in USA and zero recalls (about 14%), were close behind. About 14% said their picky dog finally ate. In their own words:

“The ability to provide a protein rich diet to my pup, who is naturally muscular and athletic”
— Bully Max customer, post-purchase survey

“Amount of protein and fat in a bag!”
— Bully Max customer, post-purchase survey

“Zero recalls and nutritional value”
— Bully Max customer, post-purchase survey

Want to see every Bully Max formula side by side? Use our Bully Max dog food comparison chart.

How to Switch from Pro Plan Sport to Bully Max

Any food change should be gradual. A slow switch gives your dog's digestion time to adjust and makes it easier to spot a food that doesn't agree with your dog.

Go slower for dogs with sensitive stomachs. Because Bully Max has more calories per cup than many foods, recalculate the daily amount instead of swapping scoop for scoop.

Some softer stools in the first days can be normal. See your vet if your dog has vomiting, diarrhea that lasts more than a day or two, blood in the stool, or stops eating.

Purina® and Pro Plan® are registered trademarks of Société des Produits Nestlé S.A. Bully Max is not affiliated with, endorsed by, or sponsored by Nestlé Purina PetCare. Product information is taken from publicly available manufacturer sources as of October 2026 and may change; check the current label before buying. All other trademarks are the property of their respective owners.

Bully Max vs Pro Plan Sport FAQ

Is Purina Pro Plan Sport a good dog food?

Pro Plan Sport is a complete and balanced food made for active dogs. Purina's label for the 30/20 Chicken & Rice formula lists 30% protein, 20% fat and 484 kcal/cup, and states its adequacy is substantiated by AAFCO feeding tests. Whether it's the right food depends on your dog's activity, body condition and how well it does on the food.

Is Bully Max better than Purina Pro Plan Sport?

Neither is best for every dog. On published numbers, the 30/20 formulas match on protein and fat. Bully Max 30/20 has more calories per cup (535 vs 484), Bully Max offers a chicken-free 30/20 and a 600 kcal/cup PRO formula, and Pro Plan Sport offers a salmon formula, a lower-calorie 26/16 and a label that cites AAFCO feeding tests. Choose based on what your dog needs.

How many calories are in Purina Pro Plan Sport?

As of October 2026, Purina lists 484 kcal/cup (4,390 kcal/kg) for Sport Performance 30/20 Chicken & Rice and 534 kcal/cup for Sport Performance 30/20 Salmon & Rice. Its published label for Sport Active 26/16 Chicken & Rice lists 426 kcal/cup.

Is Purina Pro Plan Sport good for puppies?

Purina states the 30/20 Chicken & Rice formula is complete and balanced for all life stages, including growth of large sized dogs, and it also makes Sport Puppy Development formulas. Every Bully Max dog food is suitable for large-breed dogs, including large-breed puppies, under AAFCO guidelines, and our 24/14 High Protein & Growth Puppy Food is made for puppies. See our guide to large-breed puppy food.

Is Purina Pro Plan Sport grain-free?

No. The ingredient list for Pro Plan Sport 30/20 Chicken & Rice includes rice and whole grain corn. Bully Max foods are not grain-free either. Most dogs do not need a grain-free diet. Ask your vet if you think yours does.

Can I switch my dog from Pro Plan Sport to Bully Max?

Yes. Mix the foods over 7 to 10 days, and recalculate portions because the calories per cup differ. Use the dog food calculator to set a starting amount.

If your dog needs more fuel per cup, start with Bully Max 30/20 High Protein, step up to PRO Series 31/25 for working and sport dogs, or choose 30/20 Beef for a chicken-free 30/20. Save 10% on every order with Bully Max Autoship. Have questions about switching? Ask us in the comments below.