. >> brian gillroy isn't against hunting but he has a very different approach. >> all of the revenued as the result of selling live animals. and we're not selling them for the purpose of hunting. we're selling them for the purpose of breeding. this area that we're in is broken into several smaller pastures. >> brian says he has around 1,000 animals at this ranch. >> we have antelope, white bearded wildebeest, bongoo. >> he says they made $30 million breeding and selling animals to hundreds of clients. which include landowners and private investors. >> we sell them wildlife for the benefit of enjoyment. and it's their's. they can do what they want with it. >> when those animals reproduce, brian's company buys back some of their young, selling them to other customers. >> we have some young offspring that we're going to be moving to another ranch. >> on this day, they get a request. >> in the helicopter, we've got a gunner. he's got a tranquillizer gun. they will shoot a dart with the medication in it and allow the animal to go to sleep. >> when it wakes up, it will be taken to the clie