Unsurprisingly, the American Bully diet is paramount in keeping a dog of this breed healthy, fit, and long-living. American Bully food will need to be packed with plenty of animal proteins to supply all the dog's muscles, of course--but the food will also need lots of carbohydrates for energy and omega fatty acids for coat and skin health. Many breed purists feed their American Bully a raw diet consisting of lean meats, fresh vegetables, eggs, fish, and other protein sources--but a lot of owners consider such a diet for their dogs to be too expensive and inconvenient, and choose a premium dry brand as their Bully-Pitbull's food. (Some people split the difference and feed primarily premium dry food, and add some raw/fresh ingredients to one meal a day.) Whatever your choice, cheap, generic dog food is not recommended for this breed, as it simply won't provide enough nutrients for your Bullypit to remain healthy in the long term.
American Bully dog food portions: with premium dry food, the typical adult will need 4-5 cups per day, split into two meals. American Bully puppy food portions are a bit less: depending on the pup's age, it will need 2½-3 cups per day, split into three meals (not two) until six months old. With a raw diet, an adult will need 2-3% of its total body weight in food per day. (A 90-pound Bullypit, for example, will need 2¼ pounds of raw food daily.) American Bully puppy raw diet portions are actually higher: again depending on its age, a pup will need 6-8% of its body weight in food each day. ((After nine months, you can slowly decrease the percentage over a three-month period.) For further details on dog food for an American Bully from puppyhood through maturity, reference the following chart (and for simplicity, the portions listed are for premium dry food only):
Dog AgeDog WeightFood TypeAmountFrequency2 Months12 lbsDry (Puppy formula)0.3 cups3x/day3 Months25 lbsDry0.5 cups3x/day6 Months50 lbsDry0.8 cups3x/day9 Months70 lbsDry* (Puppy/Adult)1.75 cups2x/day12 Months+90 lbsDry (Adult formula)2 cups2x/day*--Around this time, transition to adult food by first mixing in just a bit of adult formula with the puppy formula. Over the course of a week, with each meal add a little more adult food to the mixture, until the dog is eating it entirely.
It's best to try and stick to the above-listed portions; while your Bullypit could probably eat much more, these dogs will easily become obese if constantly overfed--and a fat American Bully will have joint, breathing, and digestive issues, not to mention a shortened lifespan. You can control your Bullypit's weight in several ways: by having consistent feeding and exercise schedules, by not feeding the dog table scraps, and by not leaving food in the dog's bowl all the time, thereby allowing it to eat anytime it wants. It's better to put your Bullypit's bowl down only at mealtimes, then pick it up 20 minutes or so after the dog begins eating.
If you're worried your American Bully is overweight, give the dog this simple test: run a hand along its side, and if you can't feel any ribs beneath all that muscle, it's diet time. Reduce the dog's daily food consumption by one-fourth, and add an extra walk or play period to its daily exercise schedule.