A dog that vomits green vomit may be caused by gastrointestinal disease, pancreatitis, parvovirus, etc. It is best to go to the hospital for examination and timely treatment to avoid delaying the condition. Dogs' gastrointestinal tract is very fragile, so you should pay more attention to their diet. Do not feed your dog random food, especially food that is not easy to digest. Feed probiotics regularly to help regulate the gastrointestinal tract and promote digestion.