i agree w/ wolfsoul! This needs to be seen my a vet.

How exactly did your vet no treat him right? I would seek another vet, maybe talk to new vets & vivit them first, make sure you explain his dilema w/ them as well.

Has he always been bad at the vets? How old is the dog/how long have you owned him? In the future you can train him to like the vets, go there without an appointment, as often as possible just to sit there, weigh him just get him used to the vets, bring lots of really great treats when his tummy is empty. Praise everytime he behaves there, is calm there, eventually let the techs & vets give him a nice pat & if he behaves well make sure they give him a treat. Any good vet will be more than happy to let you do this, believe me they would rather have a good dog w/ a good owner than a bad one!