I hope your Wookie is fine and all goes well at the vet. Once I found a mass of matted fur on Orion's paw, it was wedged between his little pads and the big (palm) pad. He had been to the groomer and managed to collect tiny shreds of hair from walking around the floor. She had not trimmed the underside of his feet, so didn't know he was collecting bits there. When I got to it, it was hard as a rock, I actually thought he had a stone lodged in there, and had to carefully trim it out with nail clippers. Orion has very ticklish feet, so this must have hurt quite a bit. So hopefully it will be something silly like that. If it's pano (if he's under 18 months old it very well could be) 1000 mg of vitamin C will help (daily) and takes about two weeks before he'd be pain-free. He'd need the C until about 18 months, when his rapid growth spurt is over.