Dog vomit types reveal clues about health: clear/white foam often means empty stomach/acid reflux (bloat is an emergency); yellow/green indicates bile, potentially from empty stomach or liver/intestinal issues; undigested food suggests eating too fast; blood (red/black/coffee grounds) is serious, needing immediate vet care; while mucus/slimy can signal parasites or irritation, and foul-smelling dark vomit might be digested blood or poop.
The presence of bile in dog vomit – characterized by yellow or green colors – is cause for concern. This could be a sign of bilious vomiting syndrome, a condition where the small intestine leaks bile into the stomach.
In severe kidney failure, the amount of urine may actually decrease, or the pet may stop making urine altogether. Other signs as things get worse include digested blood in the stool making the stool look black and tarry, or vomiting digested blood, which looks like coffee grounds.
Black or brown vomit that looks a bit like coffee grounds can indicate poisoning (this is a medical emergency), ulcers, intestinal blockage, viral conditions, tick-borne diseases, or cancer.
Puppies with parvovirus lose their appetite, often causing yellow vomit from stomach acid or white foam. As parvo progresses, affected puppies are often unable to keep anything down and rapidly become very weak and dehydrated.
Red Vomit (hematemesis)
When you have a significant amount of vomit that is bright red in color or resembles coffee grounds, you should contact your doctor immediately. This can be the result of multiple conditions including, but not limited to: Liver failure. Cancer of the stomach, pancreas, or esophagus.
You should worry and see a vet if your dog vomits multiple times in a day, can't keep water down, shows lethargy, has diarrhea, loses appetite, seems to be in pain, or if the vomit contains blood or looks like coffee grounds, as these signal serious issues like blockage, poisoning, or illness. While occasional vomiting after eating something disagreeable might be normal, continuous or concerning vomiting requires prompt veterinary attention, especially for puppies, seniors, or dogs with existing health conditions.
What are the symptoms of pancreatitis? Dogs characteristically display sudden onset of some of the following symptoms: Vomiting, usually yellow in color due to bile content.
Symptoms of rat poisoning in dogs
Weakness and lethargy. Vomiting or coughing blood. Nose bleeds. Bleeding from the gums or pale gums.
Warning signs of internal bleeding.
Excessive stress can sometimes lead to physical illness in dogs. The link between emotional distress and physical symptoms occurs because stress affects the gastrointestinal system. When dogs are anxious, stress hormones can disrupt digestion, leading to nausea and vomiting.
Early Symptoms of Kidney Failure in Dogs
Dog vomit colour chart
Bile (stomach acid) - this is usually green or yellow and often foamy. Food – can be undigested or digested and any colour (often brown). Blood –can be red, black, brown or if it's partially digested, often looks like coffee grounds.
Bright red or bloody vomit
If your poor pup is vomiting blood, they may have consumed poison or a non-food item like bones or toys — causing damage to their digestive tract. This could also point to a gastrointestinal disease or stomach inflammation.
Speak to your GP if:
Heartworm disease is among the top silent killers of dogs and cats, and it's a slow and insidious disease which gradually incapacitates them. By the time pet owners notice the giveaway signs of this disease, serious damage may already have been caused.
Toxicity in dogs can show up anywhere from minutes to several days or even months after exposure, depending entirely on the substance; some toxins (like alcohol or certain pesticides) are rapid, causing symptoms like drooling or seizures quickly, while others (like some rat poisons) cause delayed internal bleeding over days, requiring immediate veterinary attention even if the dog seems fine. Always contact your vet or the Pet Poison Helpline (855-764-7661) immediately if you suspect poisoning, even without symptoms.
Laxatives and medications used to empty the bowels may be recommended in some instances to help remove the poison from the gastrointestinal tract. If the poison cannot be physically removed, sometimes activated charcoal can be administered by mouth to prevent further absorption by the gastrointestinal tract.
Symptoms will depend on the product ingested. If a dog has ingested rat poison and is vomiting, the dye used to colour the bait may be visible in the vomit or stool.
Yellow or yellow-brown vomit — can contain stomach acid (+/- bile). Green vomit — can be green due to grass or bile. Red or dark brown vomit — can indicate the presence of blood or food coloring. It would be best to reach out to a veterinarian if a dog or cat's vomit is suspected to contain blood.
While occasional vomiting is usually not cause for immediate concern, certain situations warrant prompt medical attention. It's important to seek help if you notice blood in your vomit, or if the vomit appears very dark or black.
Signs of poisoning in dogs vary but commonly include vomiting, diarrhea, drooling, lethargy, weakness, tremors, seizures, disorientation, pale or blue gums, and difficulty breathing, often accompanied by changes in heart rate or body temperature; if you suspect poisoning, contact your vet immediately, as symptoms depend on the toxin and can range from mild to severe, requiring urgent care like stomach flushing or IV fluids.
Call your vet if vomiting persists for more than a few hours, or if your dog can't keep water down. If your puppy vomited a few times in ten minutes, that's okay—if they vomited three times over a few hours, it could be a problem.
Get emergency care if nausea or vomiting is accompanied by:
Changes in bodily functions.
Like people, nervous dogs may experience an increased urgency to urinate or defecate. Dogs may experience gastrointestinal (GI) upset that can include vomiting, diarrhea, and refusing food.