How often does your dog vomit? Is it a daily thing or is it once every blue moon? I have three dogs — of which one seemed to vomit each and every day. I hated finding the vomit under my foot each morning and knew there had to be something that I could do to stop it. I took him to the vet to find out what could be causing this problem. I found out there are many things that can cause a dog to have an upset stomach. This blog will show you many of the causes that induce dog vomiting.