Better-Matched Horses: The Real Answer to Stallion Concentration

A Horse Sense response to Dr. Steven A. Roman’s Thoroughbred Daily News discussion of super-sires, large books, and how concentration, economics, and mating decisions are reshaping Thoroughbred breeding.

A recent Thoroughbred Daily News article by Dr. Steven A. Roman, “The Rise of the Super-Sire: Concentration, Book Size, and Economics Have Reshaped Thoroughbred Breeding” , raised an important concern about large stallion books and the concentration of influence among a smaller group of elite sires. I agree with that concern. A stallion can cover too many mares. If too much of the breed continues to flow through the same narrow group of sires, the Thoroughbred risks creating the same kind of concentration problems that have hurt other breeds.

But today’s problem did not appear out of nowhere. It is partly the result of what was happening in the industry years ago.

When I first came into the market, there were many more stallions, many more mares, and many more foals. Race cards were fuller, but there were also a lot of horses people did not want. A larger population was not automatically a healthier population. I still remember how difficult it was to stand at the end of the Keeneland sales and watch horses sell for the minimum bid or fail to attract a bid at all. Those moments were a reminder that, in many cases, too many horses were being bred without enough consideration for whether the market or the racetrack truly needed them.

The decline in the foal crop was painful, but it was also a correction. A lot of people at the bottom of the industry left, sold their horses, or stopped breeding. The Thoroughbred population declined significantly, and the market became more selective. The problem now is that the correction may have created a new imbalance: fewer breeders, fewer stallions, fewer mares, and more concentration around the stallions the market trusts most.

At the same time, bringing new people into the business has become increasingly expensive. The cost of purchasing mares, paying stud fees, boarding horses, veterinary care, sales preparation, and simply learning how to navigate the industry can be overwhelming for newcomers. New participants can also be vulnerable to unrealistic expectations, poor advice, and expensive mistakes.

If the industry wants to attract and retain the next generation of owners and breeders, it has to do a better job creating transparency, encouraging mentorship, and helping newcomers understand risk before they commit capital.

The Answer Cannot Be More Horses for the Sake of Numbers

The answer cannot simply be more horses, more mares, or more stallions. The answer has to be better breeding decisions.

The top of the market has the money, the mare quality, and the expertise to make the best breeding decisions, whether that expertise is internal or hired. They also have the greatest ability to take risk. If they breed an elite mare to an elite stallion and miss, they may lose money, but they are usually not driven out of the business. They will continue to breed to the stallion they believe gives them the best chance to produce an elite horse. That is rational.

The middle of the market is different. This is where a lot of breeders try to mimic the top, but without the same mare power, budget, or access to advice. That is where mistakes become expensive. A breeder may stretch on stud fee, use a commercial name, or rely too heavily on a nicking report and think the mating works, but still miss the physical match between the mare and stallion. The result may be a below-average foal from a decent mare. Because the mare is still decent, the breeder may survive that mistake, but repeated mistakes eventually drive people out of the business.

The bottom of the market has even less room for error. Cheaper mares bred to cheaper stallions often produce foals that are hard to sell and less likely to perform well enough on the racetrack to change perception. There will always be exceptions, but exceptions are not a business model. At the lower end, a bad mating can become a downward spiral very quickly.

A Good Nick Is Not the Same Thing as a Good Mating

The market has also learned that nicking software by itself is not the answer. There have been too many horses bred on the “best cross” that never became good racehorses. A strong nick may identify a historical pattern, but it does not guarantee that the individual mare and stallion actually fit each other.

That is where physical evaluation has to come back into the mating decision. The mating should not start and end with a letter grade on a nick report. It should start with the mare. What does she need? Where is she strong? Where is she weak? Does she need more substance, more scope, more speed, more bone, more hip, more balance, or more durability? Then the stallion has to be judged by whether he actually helps her in those areas.

“Works from flesh and blood, not paper formulae.”

Carrie Brogden’s approach is important here. In Chris McGrath’s 2022 Thoroughbred Daily News article, he wrote that she “works from flesh and blood, not paper formulae.” That is not an argument against pedigree or data. It is an argument against letting formulas replace horsemanship.

That is where old-school horsemanship and modern data need to meet. Data can identify opportunity, but it cannot replace the physical evaluation of the mare, the stallion, and the actual type of foal the mating is likely to produce. The commercial market may buy the page once, but the racetrack still has to validate the horse.

Where Artificial Intelligence Can Help

This is also where better tools can matter. Artificial intelligence does not replace horsemanship, but it can help even the playing field. AI-supported conformation analysis can evaluate a horse with more consistency and less personal bias. It can help identify the physical strengths and weaknesses of a mare and compare them against the physical traits of a stallion. It can organize pedigree information, interpret commercial market risk, and help breeders understand whether a mating actually fits the level of the market they are playing in.

That matters at every level, but especially in the middle and lower parts of the market where there is less room for repeated mistakes. If better tools help breeders make better matches, then the industry can improve quality without simply increasing quantity.

The goal should not be to rebuild the foal crop by breeding more horses for the sake of numbers. The goal should be to produce better-matched horses. Better stallion-and-mare matches should create better foals. Better foals create more useful racing and sales inventory. Better fillies eventually become mares actually worth breeding. That is how the industry can rebuild quality inventory without going back to the overproduction problem that helped create this correction in the first place.

Gun Runner and Productive Diversity

Gun Runner may be a good example of what productive diversity looks like. Before he became a sire, he first proved himself on the racetrack. The market was not being asked to accept an unknown theory. It was looking at an elite racehorse with a different sire-line pathway through Candy Ride.

That outcross opportunity only became powerful because the horses could run. His early success created elite runner production. Elite runner production created buyer confidence. Buyer confidence brought stronger mares. Stronger mares helped produce stronger results. Stronger results increased his influence. That is how productive diversity becomes commercially meaningful.

Gun Runner was not rewarded simply because he was different. He was rewarded because the difference was good enough to make a difference.

That is the key distinction. Diversity by itself is not enough. Difference by itself is not enough. The difference has to improve the horse.

Better-Matched Breeding

So I agree that large books are a real concern. But the solution is not to go backward to a larger population filled with horses the market does not want. The solution is to improve the quality of decisions at every level of the market.

You have to be realistic about the part of the market you are playing in. The top of the market can afford to take risks that the middle and bottom cannot. The middle of the market has to avoid copying the elite market without the mare power to support it. The bottom of the market has to be even more disciplined because there is very little room for error.

The industry does not need more random breeding. It needs better-matched breeding. It needs breeders using pedigree, physical evaluation, market interpretation, and better data together to produce horses that can run, sell, and continue to improve the population.

The future health of the breed will not come from simply increasing the number of foals. It will come from producing more horses worthy of being bred from, raced, sold, and supported by the market.

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