1. Garlic and Onions
Garlic and onions can be quite toxic for cats, causing the destruction of the red cells in the blood which can lead to severe anaemia. The amount of garlic and/or onions consumed will determine the level of poisoning in your cat, and if your cat becomes lethargic and has a reduced appetite, it could be a sign of high toxicity levels in their blood. You should call your vet straight away and get her checked out.