The lactation period is between 8–18 months. The length of lactation depends on when the lactating dam is re-mated. The average daily yield in milk is 5 kg with a total yield of 1 950 kg. The amount of milk drunk by the calf is regulated by tying up one or more teats (Mares, 1954a). The amount the calf is allowed is determined by its needs and the milking capacity of the mother. Camels are milked twice a day; just after sunrise and at least two hours after sunset. Calves run with their mothers but are penned separately at night. From the age of six weeks they graze. When calves have finished suckling the amount left for consumption by the tent dwellers can vary from 1 to 4 kg
If a calf dies, the dam dries up if milking is not stimulated For this a foster calf or conditioning of the mother is necessary. Often arranging for the dam to see the skin of her dead calf is enough to stimulate let-down of milk. Fostering is done in three ways: (1) The foster calf is covered with the skin of the dead calf and allowed to suckle until the milk is flowing and the dam can be hand-milked. (2) The calf is tied down in front of the foster-mother, a rope being tied from the calf to the mother's muzzle. (3) The nostrils, ears or anus of the foster-mother are compressed with a special clamp. When the clamp is released, and the pain thus removed, the calf is presented for suckling. This is usually enough for the dam to allow the foster-calf to suckle.
In all cases the calf drinks from its own mother as well as from the foster-mother