5. This mammal is polygamous with the breeding season occurring between mid-February and mid-March. A litter usually has four to eight young that arrive in May or early June. By the time the young are 2 weeks old they are fully furred, but their eyes won’t open for nearly 2 more weeks. Young start hunting with the female at 7 weeks and by fall have set off to find their own territories. Need a hint? Their unique, and smelly, defense mechanism develops at about 8 days of age but they don’t use it for defense until they are about a month old.