I've been reading several stories where some indoor/outdoor cats are roaming to neighbors and a neighbor is thinking of keeping the cat because they decided they're happier with them. We have strictly indoor cats, my SIL has 4 indoor/outdoor cats, their cats visit their neighbors and their neighbors cats visit them. Nobody ever considers keeping another cat owners cat unless there was definite proof of abuse. Some people wrote saying it serves them right for letting their cats outdoors in the first place. Thoughts on this?