) Vomiting is one of those symptoms that can accompany so many conditions, as well. And, if your
pet is
vomiting without ingesting food, then he/she is losing even more fluids and will dehydrate more rapidly.
If your dog was only not interested in food, then I'd say to just pamper him/her and offer a small-sized bland diet. However, not drinking is more serious because dehydration can lead to organ damage - and, we all know, death.