Kittens at the time of their birth measure approximately 11-15 centimeters and weigh more less 70-135 grams. They are blind and deaf then, they cannot move around on their own so during the first period of their life they completely depend on their mother. After six-eight weeks of life they can be completely independent. They can hunt then – mother gradually teaches them how to hunt and prepares them to a self-reliant life.