How can I stop cats from pooing on gravel under disabeld daughters bedroom window front of bungalow. I've tried plastic bottles filled with water & placed on the gravel wear they poo. tried broken glass mixed with gravel. Tried throwing cat litter over next doors garden as one of the cats belong to them? Tried squirting water at them when I see them? Tried cat off ? Tried noisy dog ornaments as they get close to the spot it barks? Please I'm at my wits ends with every body elses cats. I don't wont a dog to scare them away as I go away a great deal (No animals thank you?) last result is to poison the B****y things. I don't wont to do that either I'm not a nasty person, but can chang? PLease Can anybody HELP?