Ninja is a feral cat who lived in my backyard and when I moved to a second floor apt with a big deck, I decided to take ninja with me because he was already used to me taking care of him. I bought this catio and it works great for the winter. He’s contained and seems to be ok in it day-by day. Baby steps for ninja. I feel better knowing he’s safer in it. He’s got his shelter, litter box and shelves to jump on. He enjoys the shelves a lot. Even naps on them. I plan on buying another catio for more space for him to be in since he loved his backyard at the old apt where he could walk freely.