Had a twelve week old jill off my mate last year,before he brought it over to me his 4yr old daughter was playing with it,fine with me as well.Went to feed it the next day bloody thing flew from the back of the cage straight at me,this was before i opened the cage. He came over next day and couldn't get near it. Apparently his jill got out when she was in season and mated with a Feral or Wild Polecat.She was a real dark ferret.He still has her but can't get near it.