Our littlest cat (2yo F) has suddenly stopped using the cat flap. It started about 2 weeks ago - she was following us around the house crying and we couldn't figure out what was wrong, next thing we knew she'd done a large, watery poo on our sofa :( we couldn't figure out why she hadnt gone outside as she had access to the cat flap and had never done it before.
Now she will only use the cat flap to come in or out if we physically push her through it. We assume she is using it when we're not around as we haven't found any more poo or wee anywhere, but she now sits by the door, sometimes stretching up it until we either let her out or push her through the flap.
We can't figure out why she is suddenly not using it! We have another cat that has no problems with it, and otherwise she is a happy, stupid cat - in other words, her normal self!