Bloodroot also sounds interesting. Even if it isn't cancer, that sounds like good information to know. I wish I'd heard of that 20 years ago when my cat got skin cancer on her nose. I chose not to have surgery because they would have had to remove a good portion of her face and I just couldn't imagine asking her to live that way. Sometimes the cure is worse than the disease! She lived another 10 years but it did eventually spread through her body and she was in considerable pain by the end. It just looked like a little scab on her nose for the first few years. The scab would heal up and come back but I didn't think it was anything wrong until the scab started to grow, and by then it had spread too much to remove easily already.
He is pink skinned in that area. He's an appaloosa and very pale colored overall. Kind of a silvery grey with a large white blanket and black spots.
I think I'll go ahead and bring him home, have him seen and decide what to do from there. I'm certain that she'd take him back in a heartbeat if I decide I can't care for him, and anything I can do for him is more then he'll get otherwise.