"~ jan JJsPond.us" wrote:

Are there raccoons in the UK or other fish eating (don't mind getting wet)
critters? Or are the cats in the UK particularly aggressive? Regardless,
look for the Scarecrow, a motion activiated sprinkler as shown he
http://www.km01.com/index.html click on Pest Deterrants. ~ jan

I agree. It does not sound like the work of cats.