Some books are good. Some books are great. And then there are books so powerful they change the way an entire industry operates. Breeding the Racehorse by Federico Tesio is one of those books.

If you want to breed or buy winners, invest smart and stop throwing money at overhyped pedigrees, you need to read this book.

Here’s why, and more importantly, here’s what you should do once you read it.

Tesio Wasn’t Just a Breeder, He Was The Breeder

Forget the theorists. Tesio didn’t just talk about breeding elite Thoroughbreds. He built some of the most dominant bloodlines in racing history. Nearco. Ribot. These names aren’t just successful; they define entire generations of racehorses.

Most breeders guess. Tesio calculated. He combined a mad scientist’s obsession with data and an artist’s intuition for bloodlines. The result? A legacy that still influences breeding today.

If you’re not leveraging Tesio’s methods of pedigree analysis, you’re operating at a disadvantage.

He Understood Genetics Before the Industry Caught On

Most breeders rely on nick ratings, stud fees or whatever’s hot in the sales ring. Tesio ignored all that noise. He focused on hybrid vigor, genetic balance and structural soundness long before anyone else realized these were the keys to breeding winners.

He mastered gender-balanced linebreeding. He reinforced the right female families. He knew how to manipulate inbreeding to create brilliance, not weakness.

Want proof? Every modern breeding strategy that actually works, OPTIMAL Matings, outcross balancing, dosage theories have roots in Tesio’s work.

If you’re not breeding with the same principles, you’re setting yourself up for failure.

The Biggest Breeding Myths? Tesio Destroyed Them.

If you’ve been in the Thoroughbred game for any amount of time, you’ve heard all the classic breeding myths:

• Breed the best to the best and hope for the best.
• Expensive stud fees guarantee success.
• Full siblings will perform similarly.
• Physical conformation alone determines performance potential.

Tesio proved why these ideas fail. He showed that pedigree depth matters more than surface-level nicks. That the right genetic matchups create outliers, not just averages. That a broodmare’s pedigree is just as critical—if not more—than the sire’s.

If you’re still making breeding decisions based on these outdated beliefs, you’re burning money.

Tesio’s Strategies Are the Foundation of Today’s Best Breeding Programs

Look at the top breeders today. The ones consistently producing stakes winners and Derby contenders. They all use Tesio’s principles, whether they realize it or not.

• They maximize outcross percentages to prevent genetic stagnation.
• They reinforce proven female families to stack the odds in their favor.
• They don’t blindly follow commercial trends, they create them.

Success in this game isn’t about guessing. It’s about stacking the odds. And Tesio’s approach is still the best way to do it.

How to Apply Tesio’s Principles to Your Own Breeding Strategy

Reading Breeding the Racehorse is one thing. Applying it is another.

Here’s how to start using Tesio’s strategies today:

1. Stop Relying on Stud Fees and Sales Trends – A $200,000 stud fee means nothing if the genetic match is wrong. Focus on compatibility, not hype.
2. Analyze Your Mare’s Pedigree First – The broodmare is half the equation. Make sure she reinforces the right genetic traits, not just mates well on paper.
3. Use Seven-Generation Pedigree Balancing – Surface-level pedigree analysis is worthless. Map out deep genetic structures before making a mating decision.
4. Optimize Your Outcross Percentage – Too much inbreeding weakens performance, but too little prevents consistency. Find the sweet spot.
5. Think Long-Term – Tesio bred for sustained excellence, not quick sales ring success. Build bloodlines that will hold value over generations.

Every successful breeder follows these rules, consciously or not. The sooner you do, the sooner you’ll start producing superior racehorses.

Why You Need This Book on Your Shelf—Today

There’s no shortage of breeding theories out there. Some are good. Most are garbage. Tesio’s work is different, it’s proven.

This isn’t a book you read once and forget. It’s a reference guide. A playbook. A constant reminder that breeding elite Thoroughbreds is about science, strategy and discipline.

If you’re serious about breeding or investing in high-performance racehorses, you need this book. Read it. Study it. Apply it.

Your next stakes winner could depend on it.

Clark Shepherd Bloodstock Agent, Sales Consultant & Pedigree Analyst

Clark Shepherd stands as a beacon in the thoroughbred world, renowned for his unyielding integrity and deep-seated expertise. Growing up on the racetrack, he transformed his lifelong passion into a thriving career as a trusted bloodstock agent. Clark's profound knowledge in equine management and keen eye for racehorses have led numerous clients to victory, including the pinnacle of designing the mating of a Kentucky Derby winner. Dedicated to both industry stalwarts and newcomers, he offers personalized, insightful guidance in every equine venture. Clark's ethos is encapsulated in his mantra: "Empowering Equine Success with Integrity and Insight!"

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