Of course Nathan, like anyone else, is entitled to his own opinion & even to express it. The only thing is, he manages to make it sound like his opinion is the only one that counts, because (in his opinion!) his experience/knowledge is the only correct experience/knowledge. His place of work handles stallions of nearly every breed, and since they handle few two year olds he makes it sound like two year olds of all those breeds never get used for breeding--therefore anyone who says differently must be lying? Maybe that's not how he means it, but to me at least that is how he comes across.
Nathan said:
I don't know a single breeding or owner of a stallion personally that has bred mares as a 2yo. Most wait until their horses are more proven and slightly older
Perhaps most people he knows do wait until their stallions are older. This doesn't mean that "most" people overall don't use 2 year olds for breeding--I'm thinking the number of people he (or any other individual) knows personally is a very small percentage of people/breeders overall.
"Most" of the breeders I know do breed their 2 year old stallions to a few mares. (And I am referring to a variety of breeds here, not just Miniatures.) Likewise, "most" breeders I know do not use the services of a reproductive facility such as the one Nathan works at. Firstly, such facilities are few and far between around here, and secondly, most of the breeders I know don't have the money it takes to use such a facility. They are knowledgeable horse people with high quality breeding stock, but they breed their horses at home the old fashioned way. I'm not sure that comparing these breeders to those that always use a reproductive facility is an even comparison. I have used a two year old to breed a couple mares, but if I were to use Nathan's facility, no, I wouldn't put the money out on collecting a two year old. (& I wouldn't pay money to take my stallion, regardless of age, somewhere like that to have him breed by natural cover.)
I'm another who is at a loss as to the use of the word unethical in regards to using a 2 year old stallion. It doesn't harm the horse, it doesn't harm the mare, foals are registrable. I'm also at a loss as to what a study of 14 month old colts has to do with breeding colts between the ages of 24 and 36 months. A 14 month old colt is very different from a 24 month old colt.