Why did my dog throw up white foam?

Upset Stomach. The most common cause of vomiting white foam is some type of stomach upset. It will often occur if your dog drank water too quickly after exercising or ate something that disagreed with him, such as grass or an inedible substance. read more

Similar illnesses, such as parainfluenza or other colds, may also cause your dog to vomit white foam. Usually, these will include other cold-like symptoms, such as eye and nasal discharge, sneezing and fever. read more

The health implications behind why dogs vomit white foam are varied, and range from mild to severe. So, it's important to observe your dog's symptoms and vomit in order to diagnose and treat the underlying causes behind it. read more

Usually, in such cases, the dog will eat grass and throw up white foam. In such a case, if the dog is kept off food for about 12 to 16 hours and given a very small portion before he goes to sleep, he will be fine by morning. read more