A joke among veterinarians is: "Beefy dogs need beefy diets." Such is the case with the Presa Canario, a muscular breed that will require a great deal of animal proteins in its diet to provide needed energy. Breeders and enthusiasts agree that the best Presa Canario diet is one consisting of raw/fresh ingredients: lean meats, fresh vegetables, eggs, fish, and other high-protein sources. And while this is technically true, many owners don't like the time and expense required to feed their Presas such a diet; many choose premium dry food instead. Whatever your personal choice, be sure to avoid feeding your Presa cheap, generic, or "store-brand" dog food, as it simply doesn't fulfill the Presa's dietary needs, and will likely shorten the dog's lifespan if it subsists on cheap foods alone. Further, if your Presa Canario food is the premium dry kind, it's a good idea to add some of the raw/fresh foods listed above to at least one meal per day. It's a guarantee your Presa will love you for doing so!
And how much to feed your big Presa Canario? As you can imagine, quite a lot. The typical adult Presa, depending on its age, size, and activity level, will need about five cups of premium dry food per day, divided into two meals. For a raw/fresh diet, an adult Presa will need 2-3% of its body weight in food per day, again divided into two meals. (A 100-pound Presa, for example, will need about 2½ pounds of raw/fresh food daily.) Presa Canario puppy food portions are a bit less for a dry diet: depending on a pup's age, it'll need about three cups of dry food per day, divided into three meals until six months old. Puppies will actually need a greater percentage of raw/fresh food: about 8% of a six-month-old Presa pup's body weight is suggested, then start lowering the percentage as the puppy grows. For more info, see the following chart (which lists dry food portions only):
Presa Canario Feeding ChartDog AgeDog WeightFood TypeAmountFrequency2 Months12 lbsDry (Puppy formula)0.5 cups3x/day3 Months30 lbsDry0.75 cups3x/day6 Months60 lbsDry1 cup3x/day9 Months80 lbsDry* (Puppy/Adult)2 cups2x/day12 Months+100 lbsDry (Adult formula)2.5 cups2x/day*--Around this time, transition to adult food by first mixing in just a little 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.
Try and stick to the above-listed portions if possible; dogs of this breed will quickly become obese if overfed, leading to joint, breathing, and digestive problems and a shortened lifespan. You can control your Presa's weight 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 so it can eat anytime it wants; put your Presa's bowl down only at mealtimes instead.
If you're worried your Presa Canario is overweight, give the dog this simple test: run a hand along its side, and if you can't feel any ribs, it's diet time. Reduce your Presa's food consumption by one-fourth, and add an extra walk or play period to its daily exercise schedule.