My dog has green diarrhea and vomiting. Will pumpkin or sweet potato help?

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear about Casper. Your questions depend greatly on the cause of the vomiting/diarrhea. Vomiting has many causes including intestinal worms, inflammation, infection, dietary problems (including dietary indiscretion or eating things pets are not supposed to eat, food sensitivities/allergies), ingestion of foreign bodies or exposure to toxins, bacterial overgrowth in the gut, problems in the stomach, intestines, or even problems outside of the intestinal tract/stomach including pancreatitis, kidney/liver problems, metabolic disease (diabetes,etc), endocrine diseases (thyroid or other hormone problems), etc. A thorough history and physical exam with resultant diagnostics such as fecal tests, blood tests, imaging studies such as x-rays/ultrasound can be done to try to determine what is going on.

If you can't take Casper to the vet, canned pumpkin may help with diarrhea, again depending on the cause. You can feed about 1-2 tablespoons once to twice per day. When you start feeding Casper you should start with very small amounts of bland food (chicken/rice). Start with very small amounts of canned pumpkin and then work up to the recommendation above. If the vomiting returns or diarrhea persists, you will have to get Casper evaluated.