Cats left outdoors for long periods in very cold temperatures are at risk of developing hypothermia or even frostbite, and for older cats subzero temperatures can even be fatal. Cats should not be shut out of the house for long periods of time and should always have access to warmth and shelter.
If your cat usually toilets outside, please ensure they can get can get back in again! Check your cat flap regularly to make sure it doesn’t get frozen shut by ice or snow.
For cats who remain outside in cold weather, such as feral cats, please make sure there is some outside shelter, which is dry and waterproof. This could be a shed, garage or similar, with some warm and dry bedding to snuggle down in. At the very minimum, a dry, waterproof cardboard box, covered with a bin liner or some cling film can make all the difference. It will need to be weighted down or tucked under a bush for stability, and contain a thick layer of straw (or thick wollen jumpers / blanket etc. which will need changing regularly).
Road Gritting - Rock Salt Danger:
The rock salt used to grit roads and pavements is dangerous to cats (and dogs) if ingested. They can easily walk through the substances left by gritters or salt on paths and lick it off their paws. Consuming rock salt can cause dehydration, liver failure and pancreatitis. In snowy and icy weather, keep your cats away from roads or paths where salt has been used, or wash their paws when they come in. Symptoms of consuming rock salt (which contains the same ingredient as table salt - sodium chloride, but also has harmful chemicals such as magnesium) include burns to the mouth and throat and excessive salivating and drinking. If you’re worried, contact your vet immediately.
Sheds and garages need to be checked for hazards where pets are likely to be seeking shelter: Antifreeze is highly toxic if ingested, so never leave antifreeze containers unattended in places where an animal could get to it, and take care to mop up any spillages. Less than a teaspoonful of Antifreeze can be fatal if ingested by cats or other animals, and usually causes death by kidney failure. So please take care when attending to your car.
Cats & Cars:
The warmth of a cooling car engine is a very tempting refuge for cats. Before starting your engine on a cold morning, bang loudly on the bonnet to give cats a chance to get away if they are sheltering there.