Initially, he would cover some mares and totally reject others, without rhyme or reason; no pattern could be detected in which he would mate with and which he would reject - not color, not markings, not experience (maiden mares vs veterans). He just liked some mares and didn't like others. That's why he has some foals on the ground.
The vet that comes up with horsey Viagra will make a million.
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Ticket Seller: All kind of balls...
Bodyguard: One of his is crystal.