There are many reasons for Teddy to vomit white foam, such as gastrointestinal diseases, infectious diseases, colds, malnutrition, internal parasite infection, strenuous exercise, etc., which can cause Teddy to vomit. When a dog vomits, it is necessary to check whether the dog has other complications, such as diarrhea, loss of appetite, lack of energy, fever, blood in the stool, etc. In serious cases, it needs to be sent to the hospital for examination and treatment. Pay attention to dietary taboos, supplement nutrition, and deworm your dog regularly.