In the aviary near Zvenigorod, watching through the rear transparent wall of the shelter, saw a hungry two to three weeks of a calf whose mother decided to take a break in another shelter, stalking other people's nurses. He manages to seize a nipple flew in artificial hollows females and with it quickly minces over to where she left her offspring. Native child, making sure that the place is busy, in a hurry to cling to the free nipple. It turns out that bats mother unselfishly give milk all two or three-week babies.
And it's not only kindness, but also in physiology. The resultant females milk is very, very high for such small creatures. And if it will not strain the children, the female is threatening inflammation of the mammary glands.