Can Cats Have Garlic And Onion. Please note that a pet's weight, type of breed and prior health history can vary the toxicity level of ingested garlic. Garlic, a member of the allium family, is commonly used to add flavor to our favorite foods.
Also included in this particular group are onions, scallions. Garlic, leeks, and chives which are part of the alium species are known to cause the same health. But cats, and even dogs, don’t have that ability.
When it comes to whether cats can eat garlic, keep in mind that it is estimated to be roughly five times more toxic than onions.
Similar root vegetables can also be very harmful, including leeks, chives, scallions and garlic. The side effects of a cat eating onion can be wide ranging from gastrointestinal upset, heinz vomiting, breakdown of red blood cells ( hemolytic anemia, heinz body anemia), weakness, panting, and blood. Since garlic is more concentrated than an onion, an even smaller ingested amount could lead to toxicosis—as little as one clove of garlic can lead to toxicity in cats and small dogs. Garlic is certainly not good for a cat.