Need Dog Help

[Ponyup]

Things seems to be better, but he usually has a flame up about every 3 weeks so we'll see. I've been a lot less stressed so I think that helps. He seems to like his new sensitive tummy food & we took out all people food except a bit of peanut butter or mozzerella cheese her & there. We took away his hooves & replaced it with a treat ball that he loves. Logan is a big yorkie & seemed to have an iron stomach until christmas & since we've had nothing but problems. We're trying to trouble shoot by taking certain things away. The less he gets the easier it will be to pinpoint the problem. My vet honestly things he has a nervous stomach just like his mommy. Here's the most recent pic I have on my computer it was taken last winter.