Mange was a male gnawer. He was the mate of Lapblood, and the father of Sixclaw and Flyfur as well as "two little ones", whose names were not given. In the jungle with Lapblood and Gregor, he was hungry because of lack of food, so he persuaded Lapblood and Gregor to follow the sweet smell they smelled. He saw a orange fruit. About to eat it, the plant lunged forward out of the brush and ate Mange whole.
Mange attempted to soothe Lapblood by telling her that Sixclaw and Flyfur would be taken care of by Makemince, a friend of theirs. After he died, Lapblood went into a depressed, almost insane state, where she did not take any care of herself.