I feel your pain. I'm thinking it's a food problem. I have heard and read that Bully's aren't really considered "large breed" dogs. But it could be a lot of problems he's having with that food. It has taken me a year and many different foods to figure out Jakes issues. You can save yourself a lot of aggravation and have him tested for allergies. I will tag @cowsmom..she is the food guru here and I'm sure she can help! Hang in there. You can add canned pumpkin to his food for a temporary fix..not the pie filling...straight pumpkin. But that won't solve the problem..just firm up his a bit.