Ask your vet what is best to feed your puppy. My vet (and vet friends, and vet tech friends…) all steer clear of Blue Buffalo. The percentages aren’t good to start with and apparently they can vary greatly bag to bag.
I feed my Dobe pup Purina Pro Plan Large Breed Puppy. We started on the sensitive skin and stomach formula that he was on at the breeder’s when we got him at 11 weeks. She had me add water to one meal per day to soften it for him. He always ate all his food, but seemed to like the softened meal the most. If I remember correctly he was eating about 3 cups at that point. We increased by about 1/4 cup weekly, or whenever I thought he looked a little lean.
We switched to the chicken formula (still the Large Breed Puppy) two bags ago because the sensitive formula was on back order. Luckily I had enough to make the switch slowly. He’s actually doing better on the chicken formula than the sensitive skin and stomach one. He was super gassy on the sensitive stuff and we’ve noticed a huge difference since switching him.
He’s almost 6 months old now, 57lbs, and eats about 6.5 cups per day (3 cups per meal plus about a half cup that goes in my training pouch each morning). Sometimes we add some goodies like bone broth, yogurt, or eggs.