That is a matter for the breeders. Some club members may do this for nothing. You still have to remember to always quarantine for at least 35 days. Then the breeding this process can take up to 3 months from the time the bird leaves the original breeder until it gets back. The original breeder can't use it until it goes back through the quarantine period on the way back. So with this you either take a chance in losing a lot of birds by bringing in a disease or you just don't do it.