Hey everyone, Yoshi has had this black coloration on his tail for a little over a week now and its worse on one side than the other. Does anyone know what this is and how to treat it? He just shed a couple days ago and there is no shed skin still attacked to him and the only other thing I could find on the internet was maybe some kind of fungal thing but i dont know. He looks healthy otherwise and is very friendly except not liking my phone very much lol.