Thanks for your help!
I think he's a boy and his name is Zippy. I will try putting his waste all in one corner to see if he will learn to keep a proper toilette. Because of his spinal injury, I just don't know if he has bowel control or not.
I live in Ohio, USA and if the wildlife people found out I had him, they would probably want to take him away. There are "experts" that are licensed to keep and care for injured wildlife and I'm not one of them! LOL

He likes all kinds of different foods... I have a garden in the summers so he has plenty of melons, squash, berries, and herbs to eat. I bought him a big bag of hamster/rodent food, filled with probably 10 different kinds of seed. He is always excited when I put a handful of fresh food in; he rushes over and stuffs his face like he hasn't eaten in a week! He loves oranges and grapes so I always have those on hand for him. I did not know about the almonds- thanks for that link with the food lists.
Today I gave him a sock to play with. There was a hole in the heel so I cut it off there... It is like a little white sleeping bag to him. He runs around it, finds the opening, goes inside and wrestles around. My hubby and I were laughing out loud, watching him. He was even laying on his back and kicking the sock with his good back leg! He is so quick, it's hard to believe he's partially paralyzed.
I tried pine chips in his habitat but they stuck to his belly and had to be uncomfortable, so I stopped. I keep newspaper on the bottom now and he works at shredding it and taking it into his nest box. I gave him shredded paper and tissues and he added that in... I had been changing the box out once a month but I will stop if you say so. I was just worried about the pee in there.
He's been with us a couple months now and I love him. (I returned the wheel to the pet store, he didn't like it)