Milking
Milking is the act of removing milk from the mammary glands of cattle, water buffalo, humans, goats, sheep, and, more rarely, camels, horses and donkeys. Milking may be done by hand or by machine, and requires the animal to be currently or recently pregnant. The milker may refer either to the animal that produces the milk or the person who milks said animal. Hand milking. Hand milking is performed by massaging and pulling down on the teats of the udder, squirting the milk into a bucket. Two main methods are used: Machine milking. Most milking in the developed world  is done using milking machines. Teat cups are attached to the cow's teats, and then the cups alternate between vacuum and normal air pressure to extract the milk. The milk is filtered and cooled before being added to a large bulk tank of milk for storage. The existing robotic milking has allowed cows to have the freedom to decide when to milk, but still needs to make contact with people. Venom milking. Milking is also used by extension to describe the removal of venom from snakes and spiders, for the production of antivenom.