The reason your dog is shaking after vomiting is because he is not feeling well. It is best to take your dog to the pet hospital to check the cause of vomiting and treat it in time. If the dog has no other diseases, you can feed the dog some probiotics. Regulates the intestines and stomach, relieves diarrhea and vomiting. If a dog is poisoned by food, it will also tremble and convulse, and it is necessary to induce vomiting and detoxification in time, otherwise it may cause life-threatening danger.