Cats are pretty good at looking after themselves in the cold, usually preferring to stay in the warm and dry and watch the snow fall from the safety of a windowsill or radiator hammock. However there are still some potential risks to their health in extreme weather conditions:
Urine retention – cats who usually go to the toilet outside can sometimes be so reluctant to go outside for a wee that they hold onto their urine to the point that it can be dangerous. Retained urine increases the risks of blockages, particularly in male cats, and urinary tract infections which are more common in female cats. To reduce the risks, make sure you offer at least one clean litter tray in an easily accessible place.
Ice – cats are generally more cautious than dogs and are also obviously lighter so they tend to be less at risk from falling through thin ice. However where snow is covering a thin layer of ice they can be caught out and this can lead to dangerous immersion in freezing cold water.