I agree with Barbiecat1. Thousands and thousands of cats lives are ended abruptly and unnecessarily because they are outside with no defence against fast cars, predators, poison from neighbors who don't like them, antifreeze from cars that leak on the road, mean people who are picking up outdoor cats for research (testing in laboratories); need I go on????? We do NOT let a dog go out the door freely without us (except in a fenced in backyard) - why a smaller fragile animal like a cat. Just because those of you who DO let your cats out have not had a bad experience doesn't mean you won't in the future - and your heart will be broken and no doubt your cat will have suffered. When I was little we used to let our cats out all the time - it is a different world now. One of my kitties was hit by a car (I still miss him) and another disappeared. When I was old enough to live on my own and adopt my own cats I made them a promise that they would ALWAYS be safe - and the only way I can keep that promise is to keep them indoors where they have windows to look out of, toys to play with, plenty of good (canned) food and (nonclumping) litter and trust me, they are VERY happy. Studies show that cats who go outdoors live a significant number of years less. Cats spend so much time sleeping anyway, they are safer doing it inside then somewhere where another animal can grab them and kill them or harm them don't you think? (And don't get me started on those who leave their dogs in cars, pull them along while they are on bikes, rollerblades or skateboards!)...