Q. My dog is been sad and stop eating her tail is down and yesterday she threw up and then was seezing, wasnt drnking jntil now but still no eating
A. I'm not sure if your 'seezing' typo was intended to mean seizing, as in having a seizure or sneezing. If you meant sneezing, she may have an upper respiratory infection which can affect her appetite because she cannot smell her food as well as usual. The lethargy along with vomiting is very concerning to me and if she had a seizure, the possibility of toxic exposure, liver or kidney disease is higher. I recommend getting her seen by your vet as soon as possible for an exam, labwork and possibly x-rays to determine the reason for your dog's illness and get her started on treatment right away.