Vomiting in pets

What It Is

Vomiting is the active ejection of food or fluid from the stomach and upper small intestine, usually announced by drooling, lip-licking, and abdominal heaving before anything comes up. It differs from regurgitation, which is a passive, effortless bringing-up of undigested food from the esophagus with no retching involved. Dogs and cats vomit more readily than most other companion species because of their gut anatomy, but the sign shows up in rabbits, ferrets, and ruminants too, where it often points to a more serious problem since these species rarely vomit at all.

Common Causes

Dietary indiscretion, a sudden food change, or eating something indigestible accounts for many one-off episodes in dogs and cats. Parasites, viral and bacterial gut infections, pancreatitis, foreign objects lodged in the stomach or intestine, kidney disease, liver disease, and certain toxins all cause vomiting too. In horses, true vomiting is rare and almost always signals a life-threatening problem such as gastric rupture, because the equine stomach cannot easily expel its contents backward.

When It Is an Emergency

Repeated vomiting within a few hours, vomit containing blood or looking like coffee grounds, a swollen or painful abdomen, collapse, or an inability to keep even water down all call for immediate veterinary care. Any vomiting in a rabbit, guinea pig, or horse should be treated as an emergency given how unusual it is in those species. A young puppy or kitten that vomits repeatedly can dehydrate within hours and needs same-day attention.

What the Vet Will Do

The vet will examine the abdomen, check hydration, and ask about diet, recent scavenging, and medication history. Bloodwork, fecal testing, and abdominal imaging such as x-rays or ultrasound help identify infections, organ disease, or an obstruction. Persistent or severe cases may need hospitalization for fluid support and further diagnostics.

Home Care and Prevention

For a single mild episode in an otherwise bright, hydrated adult dog or cat, withholding food for a few hours and then reintroducing a bland diet gradually is often enough. Keep bins secured, introduce new foods slowly, and keep dogs away from spoiled scraps or unfamiliar plants. Any pet that seems unwell alongside the vomiting, or that keeps vomiting past a day, should see a vet rather than wait it out at home.