When doing breeding loan the female goes to the male and not the opposite this allows the owner of the male to make sure that his male is used with one female and one female only, the owner will also likely use his male during the season.
Now the idea of breeding loan is that it will benefit both parties, loaning a Het Pied female to someone is really not that great of a benefit for anyone, anyone that has to the very least a male pied can afford a female het pied. With prices of $50 for an hatchling and $200/$300 for a proven breeder this would not be worth the risk or headache for anyone
Breeding loans are generally done with high end animals unless a friend really wants to do you a favor.