Dogs vomiting green liquid and not eating may be caused by gastrointestinal diseases, such as gastroenteritis, duodenal obstruction, pancreatitis, etc. First, the dog should be given no food or water to avoid increasing gastrointestinal burden, and feed some probiotics , and then observe the dog's condition. If the situation is serious, it needs to be sent to the pet hospital for examination and treatment to avoid aggravation of the condition. You should pay attention to your diet and don't feed your dog random things, especially bones and fish bones. Feed some probiotics regularly to help regulate the stomach.