my other suggestion is a bit costlier. cat proof your front yard or back yard. my own front yard is almost catproofed, so that my cats can't go out. others also can't get in. install nettings at you gate, your fences, whatever holes they can get in.

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Cats are precious creatures that enhance one's life. Respect them, take good care of them, and above all, love them. Their love, affection and attention will be your reward.