We headed out to the dog park tonight and played plenty of fetch with Stan. This dog park has a lot of mulch, not really grass. When we came home and I was cleaning his dirty paws, I noticed one his front paws had a little piece of skin flaking off of it. He doesn't seem bothered by it. He didn't react when I was touching it and wanted to continue our game of fetch at home. So my question is, should I leave this little flake of skin (assuming it'll fall off naturally) or should I try to remove it? Are his paws looking raw or damaged? Thoughts?