Perhaps slightly off-topic, but nearly along the same lines. What about a yearling kept in with a larger QH mare? Not long ago my and my friend and I were talking about this, as she just got her yearling colt gelded, but from December (when he was about 6 months old) until around the beginning of June, he was in with her tall QH mare, and he had the kick marks to prove it.
My friend didn't think there was any chance of him "reaching" her, but I wasn't so sure. What do you guys think?
Are yearling studs able and willing to breed full sized mares?