Dairy cows are repeatedly impregnated since they produce milk only for their young (and not continuously as many people believe). They are bred to produce 10 times the normal amount of milk; even so, male calves are deprived of any milk since they are useless to the industry. Dairy cows are kept in small spaces in barns most of their lives since it is more productive to milk them without letting them move around. In India, cattle are also left to roam and find food themselves. They feed on roadside garbage supplemented with some feed by their owners. Many die prematurely from stomachs obstructed by plastic bags. In India, it is a common sight to see cows tied to posts with short ropes spend hours in the heat of the sun, on the roadsides without water. Others spend their lives in overcrowded city shelters standing on concrete floors in their own excreta, instead of in fields. They get very little fresh air and exercise resulting in widespread disease. Many of Mumbai’s cows suffer from tuberculosis and mastitis. Pasteurization does not kill the TB bacilli, which may be passed on to the consumer. Bullocks often collapse while transporting large loads in the hot sun without rest, food and water.