I'll put my 2 cents in worth too if I may. I agree wholeheartedly with Margaret. I have 4 'rescue' cats and they are all indoor cats. These cats were all at one time lost and came to the organizations from which I adopted them. Of the 4, only the oldest one makes any attempt to even go outside anymore; the other 3 run away from the door when it opens. I take her out, in my back yard only, on a harness and leash and am outside with her at all times. This happens maybe 5 times during the summer. Indoor cats generally live longer, healthier lives than outdoor kitties. This old girl is 14 y.o. and just got a clean bill of health from the vet!