Man also injects the animals with high level hormone drugs to induce a sort of "horniness"in the animals that will encourage mating and a better chance of Pregnancy in the animals.
hmmm we could also do that with human women.. how about it?;-)
edit
I just noticed the image with that guy having sex with a goat. You might want to take that out or blur some of the parts, because it is illegal in too many countries (which includes watching/downloading the imagery).
Unless the photo was changed, that's a bunch of people, probably farmers, either performing artificial insemination or an enema on a goat. Its head is held down and its rear is raised.
Yes i removed it, thanks for the advice