My axie has had this strange bump growing on his lip for a while it was recent, it wasn't there when I bought him, and recently I noticed it got a little smaller, then it started hanging off. It was the same color as the rest of his skin, until a few days ago it turned red. He's in a tank with two other axolotls and I recently started feeding them live feeder fish, but he's not a good hunter so he doesn't eat the fish, he's lazy and has me hand feed him with a feeding stick. Sometimes he'll be eating and accidentally inhale the hanging piece of skin but spits it back out. I posted pictures of this red hanging skin. It almost looks like his lips peeling. Please help.