Why
Garlic belongs to the same allium family as onion and damages red blood cells the same way, but it's considered several times more potent. Some claim tiny amounts are harmless, yet no safe dose has been established, so it's best to avoid even small amounts. Cats are more sensitive than dogs, and raw, roasted, powdered garlic and garlic oil are all risky.
How to give it / if eaten
If your pet ate garlic or a garlicky dish, call your vet or an emergency clinic right away, since signs can be delayed by days. Record the time, amount and dish, and don't induce vomiting at home unless a vet tells you to.
Watch for these signs
Vomiting, diarrhea, belly pain or drooling may come first, followed days later by anemia signs: pale gums, weakness, panting, a fast heartbeat and dark red urine.
FAQ
Isn't a little garlic good for dogs?
What's healthy for people isn't necessarily healthy for pets. Benefits and safety at small doses aren't established, while the anemia risk is real, so don't feed it on purpose.
My cat ate a bit of food seasoned with garlic. What should I do?
Many home-cooked dishes contain more garlic than you'd think. Especially for a cat or small dog, tell your vet how much was eaten and ask whether it needs to be seen.
General information only. Weight, age and health conditions change how a pet reacts, so ask your vet if you are worried.