Moved into our new house in the summer, installed a cat flap which our cats haven't had since they were a year old (now 7). Once they could come and go as they pleased they stopped using the litter tray so we took it away about 3 months ago.
Woke up this morning to wee by the front door and poo by the back door.
Is this just because it's so cold? Do those of you who don't have litter trays usually set them up in winter / cold spells?