Is there any way I can help my dog to over come getting his very upset stomach he does it on the slightest bit of food different to his meal I have to give him superdog for sensitive stomachs and gluten and wheat free ticbits at shows but they don't get his attention in the ring and sometimes he doesn't move very well and I think its because he feels a bit ill can anyone help his an American cocker spaniel

Get the dog to the vets.

what about trying to get him focused on a squeeky toy at shows instead of food, the other thing is to smear something smelly on your hand which he can't eat but can smell, to get his attention. You don't say if he has vomit or diah tummy upset. Have you tried adding a probiotic to his diet.