FLEETWOOD, Pa. — At Misty Moor Holsteins, genetics is a topic full of promise and probabilities, but for Brandon and Lisa Weaver, it also spills into family life with outcomes beyond the odds.

On the dairy, genomics guides breeding decisions, accelerates progress, and shapes a modern Holstein herd. At home, genetics carry heavy weight, teaching lessons about control, faith, and perspective.

What grounds the Weavers today is seeing their three children play, laugh, learn, and help with chores — moments all the more cherished after seeing them so sick early in life and nearly losing their oldest daughter.

“With animals, it’s biology,” Lisa shares. “With family, with humans, it’s everything beyond that. Feelings. Faith. Community. God is bigger than all of it.”

Brandon and Lisa discovered with their first child that they are recessive carriers of MSUD, a rare metabolic disorder. Testing confirmed each pregnancy carried a one-in-four chance their child would be affected.

Then the improbable happened three times.

Their children — Leticia, 9, Declan, 6, and Amya, 3 — were all born with MSUD. All three required liver transplants between roughly 18 and 36 months of age. The Weavers are expecting their fourth child, living again with the math they know well and the reality they know even better.

MSUD prevents the body from processing certain amino acids found in protein. From birth, care is a constant balancing act — just enough protein to grow, but not trigger a metabolic crisis.

“It’s a tightrope,” Lisa explains. “Blood tests. Constant monitoring. That’s why we do something as crazy as transplant.”

Today, the children live largely normal lives, taking anti-rejection medication and undergoing periodic monitoring. But the fear never fully leaves. In 2020, years after her transplant, Leticia nearly died when scar tissue caused a bowel obstruction.

“We nearly lost her,” Lisa reflects, adding that they never stop wondering if a fever or stomach ache could spiral into something life-threatening.

Those experiences shape how the Weavers view risk, success, and what truly matters.

The bright side

The bright side of genetics came last October, when one of their heifer calves qualified for the World Dairy Expo World Classic Sale. Misty Moor Mican Lacey is the granddaughter of a bred heifer they purchased a few years ago from Richmond Farms in New York. She surprised everyone as second-high seller to Peak Genetics in Wisconsin.

The timing mattered. Brandon and Lisa had just learned they were expecting again, along with all the uncertainty that comes with this knowledge. Brandon’s cousin brought the internet connection to their home to watch the sale online together.

“It was a boost,” Brandon reflects. “A little hope.”

It represented breed progress, validation of years of work, and a reminder that effort matters, beyond odds and outcomes.

Fascinated by genetics since he was a teenager, Brandon took breeding classes and began learning how to implant embryos at age 15, working with his father Eugene’s herd. “I was practicing with his money,” Brandon laughs.

Eugene had a herd of solid Registered Holsteins with good production, but without an intensive embryo program. When genomics emerged around 2009, Brandon leaned in. Eugene gave him room to explore, especially since he was the one of three sons interested in staying on the farm.

In those early days, Brandon also met Mark Comfort, through his parents’ Weaver’s Farm Supply, which sold the Udder Comfort products. As Mark came to the area and began talking genetics with Brandon’s father, Eugene was quick to say: ‘You need to be talking to Brandon!’

They talked often, comparing bulls and discussing genomic strategies and worked together on some embryos.

“Dad let me do more on my own just to keep my interest there, especially the genetics part. In the beginning, I was mostly buying embryos. Once you get cows that work, you multiply them,” Brandon says, reflecting on the gradual transition of the dairy, completed in 2014, the year he and Lisa married. Milk prices were good that year, and it gave them a good start.

Today, about 90% of the 70-cow milking herd carry the embryos Brandon implants from the herd’s own higher-genomic heifers.

If the pipeline runs short, they purchase embryos. One example is Garfield, a heifer calf sired by Hi-Note, going back to Pen-Col breeding. Under prior circumstances, they would have offered her for sale at market price.

However, when genomic results recently placed Garfield in the Holstein top 60, her ‘next generation’ contract came into play. While terms vary, all the major studs tie contracts to the male and female offspring of their top bulls.

The Weavers had two choices. Rather than sell Garfield to the stud at their set price, a fraction of her value, they chose to keep her and share control. The stud controls 50% of the matings while the Weavers can make their own matings and market an IVF session.

An IVF session with Garfield is consigned in the upcoming Hammertime Sale on Jan. 12, 2026.

“That’s just how it works today,” Brandon says about the era of genomic ‘next-generation’ contracts.

He and Lisa talked about the response among prominent Registered Holstein breeders, especially with larger herds, who have begun creating their own stud pools to keep more control of their genetic progress. This was also a factor in Holstein USA starting Marketplace Sires, a member pool where breeders retain control.

Two cows at the core

Meanwhile, the Misty Moor herd remains the priority, anchored by two foundation cows: Perfume and Z-Simba, representing 75% of the herd today.

Parson represents what the Weavers value — durability, distinct from longevity. With today’s genetics, they believe cows don’t need to stay in the herd as long to pay their way. “Two-year-olds now can milk like 5-year-olds used to, with a lot less maintenance,” Brandon observes. He credits genomics with speeding up progress that once took generations.

Fifteen years ago, the Misty Moor herd struggled to reach 90 pounds, happy with 3.8% fat and 3.0% protein. Today, they average around 90 pounds with 4.93% fat and 3.56% protein, even in a challenging forage year. Before switching to this year’s corn silage, the herd was at 100 pounds.

Genomics with balance

Unapologetic about being genomic-driven, Brandon is not number-blind. He uses the top bulls, sexed semen, and looks at TPI (Total Performance Index) to ensure he’s operating in “the right genetic neighborhood,” he explains. “But we make sure we’re not giving something up. I’ve seen people get addicted to breeding for numbers only, and it was a dead end.”

His approach is “matching numbers,” using genomics, what the DNA says about the animals, in the same way one would use numbered visual observation.

Functional type is important to their breeding goals: “If we focus on Net Merit, there’s no type in that,” says Brandon, noting Net Merit focuses on lifetime economic return while TPI, developed by Holstein USA, blends production, health, and functional type.

“We want to breed cows we want to milk. We’re not into show business. If we have Good Plus and Very Good cows that do the job without problems, that’s all we ask for.”

Impact on management

Modern genetics have changed their management. In an industry still anchored to 60-day voluntary waiting periods, the Weavers rarely breed cows before they are 120 days in milk, 150 for older cows. Losing a 2-year-old that was producing more than 110 pounds at dry off, after breeding her back too quickly, is a lesson that stuck with Brandon.

“At 60 days, she’s just getting started in lactation, and at 100 days, she’s in her prime,” he observes. “Cows hold peak production longer today. To dry off a cow milking 100 pounds, that’s not efficient. We have bred cows to milk, and now they are doing it.”

Perspective no index can measure

For the Weavers, genomics will always be a central tool for their dairy.

“The dairy business helps our family have a good life,” Lisa shares with gratitude, offering some vulnerability in the way genetics carry deeper life lessons at home.

“At the end of the day, what you really want out of life can never be bought. Without faith, family, our church, and community rallying around us, there wouldn’t be much meaning to any of it,” she says.

Their experiences live in both sides of genetics — the promise of probability, and the reality beyond the odds of outcomes that aren’t ours to control.

That perspective, earned in the barn and the hospital, is something no index will ever measure.