My 1 yr old sheltie started throwing up a few days ago and seems to keep doing it everyday, I took him to the vet, but they wanted to run a bunch of test, he doesn't have a fever. He just throws up. He is teething and chews alot of stuff, would there be a possibility that there is something lodged in his stomach or intestinal area? I need help, I'm afraid he will get dehydrated from this. He acts normal other then the throwing up part.