The dog's twitching and inability to vomit may be caused by improper diet, gastrointestinal disease or viral infection. It is necessary to observe whether the dog has other abnormalities. If the situation worsens, it is best to send it to the hospital for examination and treatment. When feeding your dog, you should feed it in small amounts and multiple times. Do not feed too much at one time to avoid indigestion. Do not feed your dog spicy food that is not easy to digest.