Newborn bear cubs are tiny (about 500 grams), blind, deaf, toothless, almost naked

The cubs immediately "bury" in the mother's thick fur and begin to suck very fat milk, which they eat for up to 4 months. The auditory passages open after about 2 weeks, and after about a month the cubs begin to see. In the spring, at the time of leaving the den, the weight of the cubs increases by 4-5 times, they become covered with hair and can actively move around.