Originally Posted by old git

Although I worked out a way to discourage cats from using my garden as a tiolet Jack Frost has decended on us and rendered my idea useless (I rigged up a sensor in the front gerden connected to aa electrically operated water switch under my sink. So when the cat came to poo it got soked instead. But because Jack Frost has appeared my idea won't work. Frozen solid).

What I wanted to know, are cats affected by high frequentcy noise as dogs are. I was thinking of those whistles that humans cant hear. Or is there some other trick I can use untill the warmer weather arrives.