I have a Buff Orphington that I've had for about a year now (i think she's about 4 ish) and I'm concerned for her feet. When I first got her I noticed that her toes (especially between them), the backs of her feet and parts of the bottoms of her feet didn't seem to have scales and seemed a little pink and sore. Especially if its cold or wet out she frequently lifts one or the other foot, flexes it and holds it tucked into her feathers for a moment, switches feet and then keeps walking. I assumed this was either from the poor nutrition or wire bottomed shelter she had at her last home and figured it would heal. I was wrong I guess. None of my other birds, including one from her same flock have this problem or exhibit this behavior. Is arthritis a thing in chickens? I can't seem to find any one else who has had this problem.
I will try to get a picture a little later when the rain lets up.