Oh man. My tortie had a stroke a few years back, affecting her back end. She’s regained the ability to walk and run and jump mostly, but she does it on gimpy back legs. She walks on her hocks, so her knobby back knees make contact with the ground. So when she runs, she really hops kinda like a bunny. She clomps around, and her tail doesn’t move either. So she’s had a rough go of it. But the back feet curls have increased tenfold when she’s lying down. It’s pretty adorable.