thanks for all the feedback! i never would have assosiated it with anal glands and i will look into that. he is eating Royal Canin puppy right now and i feed him twice a day but he never eats it all and most of the time he will have access to the food all day long so i dont think its an empty stomach. most of the time he will trow up a bit of white foam, but sometimes nothing even comes up. im going to keep a log of it to see if i can see any patterns.
i had a pup with pancrease problems goiwing up and i mentioned that to the vet too, but she said that even though yorkies are prone to those problems, she didnt think that was it. he never shows any pain and i know my pup growing up always was streaching and in pain when her pancrease would act up.
he hasent vomited in 2 days so i am going to keep an eye on him and if he does it again im going to take him to get a second opinion. i have yet to find a really good vet in toronto that i trust with my babies 100%