They don't cause too much trouble Dick. When I first sowed my peas I covered the ground with bits of shrubbery clippings from last year to keep them from digging in that spot, which worked well. One cat in particular comes into the greenhouse and sleeps in in a big flower pot but she doesn't do any harm really. The house behind me is derelict and the garden is completely overgrown, like a jungle and I'd say its a haven for rats. So the cats are doing a job for me keeping them at bay, I have yet to see one thankfullyCats in your garden John? Do they leave many" messages"?? I don't think there are many in my area that miss my garden. I have 2 that come sneaking around that would be inside the house if I let them.One lodges in my greenhouse (the door will not fully close) to escape the kids where it lives. They "rag" it to bits at times.