Originally posted by: leftyman
from
wiki
A stallion is
usually trained to mount a phantom mare, although a live mare may be used, and he is collected using an artificial vagina (AV), which is often heated to simulate the vagina of the mare. The AV has a filter and collection area at one end to collect the semen, which is then processed in a lab. The semen is then chilled or frozen and shipped to the mare owner. When the mare is in heat, a veterinarian introduces the semen directly into her via a syringe and pipette.
he must be able to mount, and after (if) he is recovered there are doubts to if his repaired hoof can handle that stress.