I’m not sure if it is it’s just the very tip of her tail noticed it today while i was bathing her. If i gently grab it with my fingers she doesn’t do much she might move to see what i’m doing if i press just a little she pulls her tail away. Now i know nobody would like having the tip of their tail squeezed so idk what to think. She also hasn’t shed since may/june so I don’t think it has anything to do with that.