The number of pigs that you should start with depends with the amount of capital that you have, your intended scale of production and the available housing facilities. You need male pigs which are known as boars, as well as female pigs which are known as sows. One male pig can service upto 20 female pigs. You can start with just 5 female pigs for a small piggery business, or 100 female pigs for a large commercial pig farming business.