I have a pacman frog named Toad. Today he started flipping himself over. he's done it numours times and i'm worried sick. I've washed down his tank. had him sit in his water dish. nothing is helping. he has a little hard lump on his back that's not normally there. I put him in his tiny feeder tankwith some moss and he hasn't flipped yet. but I don't know what's wronge. please can someone help me.