Hi, I have a question for anyone who knows about food allergies/sensitivities. I just switched my dog from Performatrin to Wellness Senior Formula, and he started throwing up after every meal. My vet didn't seem to think it was related to any food issues but I am wondering if maybe he's wrong. He had blood work done and his eosenophils (allergen cells) were higher than normal, he was checked for migrating worms (an indication in hight eosenophils) and was found to be clean. Now I don't know what to do! Any suggestions or advice would be helpful!