As an owner of 4 siamese cats, I can categorically say this is what you need, after a couple of good soakings they’ll not be back in a hurry.
Gotta catch them first though. Our neighbours have just got a cat, and it’s enjoying shitting in our garden. I like cats, but I don’t wish for our garden to become it’s toilet. I am looking forward to catching it so I can blast it with the hose. At high pressure.
Just want to make sure that it is clear that everyone who suggests using anti-freeze in these discussion is proposing poisoning someone’s pet (noting the distress that will cause) and encouraging illegal behaviour under the animal welfare act.
So you keep saying, we get it. Legal issues aside, I’d not feel too bad about killing a cat (or indeed a dog or fox) for defecating in my garden, although it would be more of a last resort, rather than a ‘I’ll try this first’ thing.