About three weeks ago I noticed a little spot on Pipers shoulder and just figured she cut herself or something. Well it went from being about the size of a pea to a size of a nickle. I'm thinking it's a Histiocytoma. She has been scratching it so it has scabbing on it because of that. I have tried covering it up with ace bandage, but she manages to get it off. She's going to the vet this weekend. Thoughts?? Sorry about the pictures, my camera isn't working well for some reason.