I have to admit- scratching posts for the cats are hit-or-miss in this house. But I had an antique cheese grater that I didn’t know what else to do with. It was COMPLETELY dull to the touch so I knew it would be safe for upcycling into a DIY cat toy of some sort. And the more I looked at it, the more I saw a DIY cat scratcher that I could hang from a doorknob.