I have a male neutered cat that was born feral but we took him in when he wandered off from his mother. He wants to go outdoors and he is always scratching at our sliding glass windows, but we live in a busy suburb and I don't want to let him outside also because of the feral cats in the woods behind us and the dogs in the neighborhood. So today I carried him outside in my arms and he seemed so facinated he was looking all around and he really seemed to like it. So I was wondering if there is any equipment that I can buy to keep him safe and let him have fun outdoors in our yard which is fairly big.