Please look up my original post regarding my Oscar's battle with this illness. Link here -
http://www.yorkietalk.com/forums/sic...orkie-two.html
Also, I would highly suggest a home-made diet - I used one from Hilary Watson, information attached (she is awesome answering any questions). Even though your vet may suggest a medical diet, it is no where near as good as home-made. Also, you MUST never feed him anything fattening - not even a little bit - if he needs a treat give him peas. Good luck and keep me posted - any questions please let me know.
THE BALANCER Home-Made Meal Supplement for Dogs