Commercial livestock rearing is organized and capital intensive. The ranches on which it is practised are permanent and cover large area, which are further divided into fenced parcels to regulate grazing. When one parcel is grazed, the animals are shifted to another parcel and the number of animals in a parcel are kept according to the carrying capacity of the parcel. Only one type of animal (like sheep, cattle, goat and horses) is reared. Their products like milk, wool and hide are processed and packed scientifically, and then exported to world markets. The main emphasis is here on breeding, health care, disease control and genetic improvement of the animal. This is totally market and profit oriented. The developed countries like New Zealand, Australia, USA practise commercial livestock rearing.