2.The cubs begin walking while in the den at about two months. By this time, they also have thick, whitish fur and their teeth have erupted. 4.Mother and cubs remain around the den for about 12 more days, sometimes longer. This enables the cubs to acclimate to the colder weather and develop their walking muscles. 5.When ready, the mother polar bear leads her cubs to sea ice.
Travel is slow with frequent rest and nursing stops.
A mother will sometimes carry her cubs on her back through areas of deep snow or water. 7.The cubs grow quickly on their mother's fat rich milk and on seal blubber. 8.Polar bear cubs learn to hunt by watching their mother. Cubs will try hunting in their first year, but don't seem to be successful until they're over one year old. 9.When her cubs are about 30 months old, a female polar bear is ready to breed again.