Buddy is now 3 1/2 years old, and when he was little, he threw up almost every morning and it was thick yellow foam. One vet said it was because he went to bed with a full stomach and another vet said it was because he went to bed with an empty stomach. We we mad sure he ate about 1 hour before bedtime and we swapped his diet to a lamb and rice formula and it helped out tremendously. He has now since grown out of it and only throws up very rarely. If you dont mind me asking a kinda gross question, what does the vomit look like?