Check your feline friend's bedding is away from cold draughts and stays warm and dry. In the coldest months, it's important that your cat has access to a warm environment, such as your home or another heated indoor area. Be aware that antifreeze and rock salt can be poisonous to pets. Learn more about antifreeze poisoning in cats. Check under your car for sleeping cats In cold weather, cats may decide to take shelter under your car, including crawling under the bonnet and wheel arches to soak up the warmth from the car engine and tyres. Before setting off in your car, make sure you tap the bonnet of your car and check around the wheels and on top of the tyres before you start the engine and drive.