No. We never have. They can get diseases from being outside. Plus we have a neighbor who is the local "crazy cat lady." She has a shed that has heated water for the local wildlife, puts out a 16lbs bag of cat food a day, bird food, and then some. It attracts all the local cats, but raccoons, opossums, and everything else. It's best for them to be inside. Especially, since she told us one of her cats has Feline AIDS. Luckily, our cats are too chicken to even try to go outdoors.