I like the idea of making a ramp to encourage the use of their back claws. We may have to make it a little lower for our cats, but it still seems like a great way to encourage exercise. I could attach it to a bookcase
Cat shelves or cat walls? No matter what you call them they are the coolest diy cat idea I've ever seen. Cat climbing shelves are a great way to make something cool for you cats & save space in your home.