Some people use orange peels to keep cats out of their garden. I don't know if it'll work though as when we tried to keep my cat out from under our deck with them the cat just brought the peels out and pottied.
ETA: the other female cat chews on the peels, but both males hate them..maybe it's a gender thing?
ETA: the other female cat chews on the peels, but both males hate them..maybe it's a gender thing?

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