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Why is My Dog Vomiting?

It is alarming when your dog vomits. If your dog just vomits once in 24 hours and seems otherwise fine, then your dog is probably fine. Otherwise, you need to be concerned. Our veterinarians at North Central Animal Hospital in Phoenix would like to look at some of the reasons why your dog is vomiting.

Bilious Vomiting Syndrome

Is your dog vomiting white or yellow foam soon after waking up in the morning? Your dog most likely has bilious vomiting syndrome, which happens when the stomach has been empty for a long period. Stomach acid builds up and irritates the stomach, leading to vomiting foam. Giving your dog a snack right before bed helps alleviate this issue.


Vomiting or vomiting blood are common symptoms of poisoning. It usually comes with other symptoms like diarrhea, seizures, trembling, lack of coordination, breathing problems, swelling of the face, and collapse. This is a medical emergency and your dog needs to go to an animal hospital right away. Do not try to make your dog throw up more.

Internal Bleeding

If your dog throws up what looks like old coffee grounds, call the veterinarian. This is old blood. Your dog is bleeding in the stomach or somewhere in the digestive tract. Call the vet if your dog is throwing up fresh blood as well.


Many illnesses can cause chronic vomiting in dogs. If your dog is throwing up more than once per day, cannot seem to keep any food down, or has other symptoms than vomiting, your dog is sick and needs to be seen by a veterinarian.

Parasitic Infections

Intestinal worms, particularly roundworms, cause dogs to vomit. They may even vomit up the worms. Roundworms are particularly deadly to puppies and very small dogs since they get dehydrated very fast. Other signs of worm infestations include diarrhea and a pot-bellied appearance. Putting your puppy or dog on a heartworm preventative medication also eliminates many other kinds of worms.

Get Treatment for Your Dog’s Stomach Issues in Phoenix, AZ

Our veterinarians at North Central Animal Hospital are here to help if your furry friend is experiencing stomach issues. Call our team today at (602) 395-9773 or reach us through our website by using our online contact form for non-emergencies.