So I recently discovered that my guinea pig has one of his toes on his front paw injured. I had to leave him at the care of a family member because I needed to go out of town and then when I came back I was sick. Therefore, i havent been super present lately. I was aware his nails need some trimming, so when I was going to trim them, I saw this. It doesn't appear to hurt him when I touch it nor has it affected his behavior or habits, but I am concerned. Do any of you know what this could be?