u/Educational-Use-6250

hi rodent lovers of reddit. i dont know if this is the right place for this, if its not would love if someone could direct me there! one of my mice from my first colony of ladies (2f, feeder mouse) is developing a bald spot on her forehead ! im wondering if its from aging or if theres anything else that could be causing it? (her sisters over grooming her?) all their enclosures are up to date with every credible source i can find.. none of her sisters seem to have any problems either.. let me know if more info is needed