My rooster is a big, old boy and his spurs are big and thick. So instead of removing, I decided to trim with a Dremel (the sanding tool). It worked great, no pain, no blood. But last time, I came to this area of the spur that was not solid. It looked sort of like a lattice and had little holes in it. I stopped because I didn't know if that meant the 'quick' was coming up. Well, that spur looked dirty and black (stuffed with poop?dirt?) shortly thereafter. Now it has big black stripes running down it lengthwise on the inside. Did it bleed in there? Or could it be infected? And, he has started high-stepping with that leg. Something is hurting (foot looks fine). The other spur looks fine, completely normal. Has anyone seen this? Or know more about spur anatomy than I can find out?