Four times in the past couple of weeks my 5-year old dog has thrown up a greenish yellow liquid, usually in the morning. One time I wasn't home and my husband described it as white and foamy. I turn to my FIL with all of my dog concerns since he's had 10 dogs (at least!) in his lifetime. He keeps saying that dogs throw up occasionally and it's nothing to be concerned about. If my dog was throwing up food, I would say that he's right, but throwing up bile seems serious. I'm contemplating taking him to the vet after work.

My dog eats twice a day, but I have noticed his appetite has diminished (he only eats half of the wet food we put out for him). He snacks on kibble all day though.

Am I overreacting? Does anyone have any experience with this situation?