Can Dogs Eat Onion?

Dogs for the most part love food, and let’s face it all dogs have attempted to steal some type of human food from their owners. This can be a dangerous thing since there are many types of foods that dogs should never ingest. One of those foods is onion. Onions can be very toxic to dogs so you must avoid feeding this vegetable to your dog at all costs. Here we will go over what you need to know about keeping your dog safe from onions along with their garlic cousins.

Onions are toxic to dogs.

Onions are toxic to dogs. This means that if your dog eats an onion, it will probably become ill.

Onions contain a chemical called n-propyl disulfide, which is responsible for their strong flavor and odor. The body cannot break this chemical down, so it builds up in the bloodstream and causes red blood cell damage. In addition to causing anemia, onions can cause stomach upset such as vomiting and diarrhea; liver damage; kidney damage; or death (depending on how much of the onion was consumed).

Onions and Garlic Poisoning in Dogs

Onions and garlic poisoning in dogs is a serious condition, but it’s not common. Both plants contain thiosulphate, which causes anemia and kidney failure. Garlic also contains the chemical allicin, which is responsible for red blood cell damage.

Onions have been known to cause anemia in cats as well, though garlic doesn’t seem to have that effect on cats or other animals—including humans! It’s unclear why onions are so much more toxic than other foods when ingested by dogs; some researchers think it might be due to their high sulphur content.

Dogs who consume large amounts of either onion or garlic may experience vomiting, diarrhea and lethargy within a few hours after consumption; if you suspect your dog has eaten too much onion or garlic then contact your vet immediately!

What to do if your dog eats onion?

If your dog eats onions, call the vet or take him to the emergency room. Onion-related toxicosis is a common cause of vomiting and diarrhea in pets.

If you are not sure whether an item contains onion, check the label carefully before feeding it to your dog. If the product does contain onion, throw it out immediately so that your dog cannot eat any more of it.

If you find no trace of onion in an item that has already been consumed by your pet and he continues to suffer symptoms such as vomiting or diarrhea (or both), contact his veterinarian right away because he may need to be hospitalized for intravenous fluids and supportive care until he is stable again

Onions are toxic for dogs, but you don’t have to worry about letting your dog eat a tiny bit of onion.

It’s important to note that onions are toxic when eaten in large quantities by dogs. In fact, they can cause anemia in dogs and gastrointestinal problems. Onions have also been known to cause liver damage when consumed by animals like your dog who have sensitive stomachs.


Onions are toxic to dogs, but you don’t have to worry about letting your dog eat a tiny bit of onion. However, if your dog has eaten a lot of onions, or onion-containing foods such as pizza or Chinese food, immediately take them to the vet.