I just adopted a dog from a shelter. She has been a light eater since she has been at our house (3-4 days). Yesterday, She finally seemed to like Mighty Dog food, liking the can clean!! Yesterday she was examined by the vet and he said that she looked good. She was given the first lyme vaccine and a heartgard chewable. She did not have a bowel movement that night. Finally today she went but, it was a very watery stool. She did vomit once. Then she drank water and vomitted that up. She has been quite lethargic. She has since drank water and ate a meaty bone treat which she has kept down. Could the vaccination or the Heartgard caused this? Or could it be the food?
It could be all of the above. If the vomitting and diarrhea continue then I recommend a second visit to the vet. For now you can give 1/2 the childrens dose of pepto-bismol. Good luck, vetcare