well, so many dogs get this from pigs ears and right about thanksgiving, when they get some turkey gravy, etc.
It's all about grease and fat.
Any GOOD diet is balanced, so I would have her look for something that doesn't have stuff like bacon fat, flavors, etc.. or beef tallow. Yuk
Of course they will offer Science Diet low residue or something for him from one of their prescription lines, but it's mostly the treats like ears and other fatty things. It's rather painful too. I sure hope he's ok soon.