The number of mares bred to stallions in their third and fourth years has always dropped off pretty dramatically. Breeders who didn’t jump in early then usually wait to see how the horses’ offspring will run. Top sire Into Mischief had something like 100 foals in his first four crops. Then they came out running and put him on the map.
But the flight to new stallions has become even more frantic recently. Now even second year horses are shied away from. This revolving door philosophy has stallions in and out of Kentucky before they even have a fair chance to prove themselves. It used to be that I would go see all the new stallions every year, maybe 10-15. Now there are twice that many and, for most of them, I don’t bother. Because chances are, they won’t be here long.