I have a 2 yr old Manx and a 1 yr old Torty. They play and run 24 hours a day. Especially at night. They a re like vampires. I am lucky as they love each other, but they are not declawed and all the running and jumping is taking a toll. I am using the soft claws, but they chew them off pretty quickly. I am looking forward to the day I can actually place something out and not have to worry about them knocking it over and breaking it .