I agree with all that Jen posted as for reasons. I also have to add that it just plain isn't fair to your neighbors for your cats to be running loose outside. They often will use flower beds as litter boxes...can eat harmful outdoor plants, get into cat fights in the middle of the night or early morning or break the hearts of those of us who keep our cats indoors and are worrying if that cat is a stray or someone's pet that just seems to like your place better. Besides it breaks my heart everytime I see a dead cat on the road. It is bad enough having to deal with the dead wildlife. Why should those of us who care also have to deal with dead pets.

Denyce

Oh...my four are INDOORS ONLY except with close supervision and only 1 or 2 at a time.