If you & the vet think it's food intolerance, they have a test called NutriScan, developed by Dr. Dodds. Here's a thread about it:
http://www.yorkietalk.com/forums/yor...-test-kit.html
Since I've removed the offending proteins from Turbo's diet, he has stopped throwing up. That was his specialty. I got the 2 panel test for him.
I'm just wondering if he has IBD or some other issues going in in his digestive tract that might need further testing. Has a specialist been considered? Hope you'll find answers soon!