How do you keep feral cats from using your yard as a litter box?

Bet30725423
by Bet30725423
My side yard gets very little sun so it's mostly dirt. I tried to grow grass but haven't been successful. The cats have taken over. I tried vinegar, Mr Clean floor cleaner, ammonia, commercial cat training spray, and finally rolled out some chicken wire over the whole area. After that didn't work, I rolled some black plastic over the wire and have layered that with long planks and bricks to make it difficult for them to find an inch of space to leave a "deposit". Nothing works! And the side yard now looks like a junkyard. Any suggestions?
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