Capons fetched four times the price per pound of a typical chicken, he wrote. They had value before slaughter, too: Capons would mother chicks better than hens while still retaining enough of a rooster’s fierceness to fight off hawks. If only farmers had the patience to learn “caponizing,” this particular form of castration, and let the birds grow long enough to develop their tender, distinctive flavor, capons would become “the life-giving, brain-forming, strength-producing food that is required by the high strung workingman of modern times,” Beuoy wrote.

Obviously, he was wrong.

Today, the capon has nearly disappeared from view. When capons pop up in stores or on restaurant menus, most modern diners assume that they’re game birds or perhaps akin to Cornish hens. But because hormonal changes caused by caponization allow more fat to build up both below the skin and within muscle, capons come with the promise of a substantial amount of buttery, tender meat. So why are they gone?

It comes down to fact that the method to make a capon a capon is still the same as it was when Beuoys wrote ”“ a process that may be an unfairly forgotten piece of agriculture, or simply a means to a somewhat disturbing luxury good.

The caponizer searches for the testes, each about the size of a grain of rice, and rips them free of their connective tissue with a small slotted spoon ”“ or, in some cases, a tool made out of a loop of horse hair.

Bill Keough spent 20 years caponizing cockerels for Iowa’s Wapsie Produce, which dominated capon production before ceasing operations in 2010. To make a cockerel a capon, he explains, a caponizer must restrain the 3 to 6 week old bird by tying weights to its wings and feet to prevent movement and expose the rib cage. Then the caponizer cuts between the lowest two ribs of the bird and spreads them apart with a special tool to open up access to the body cavity. Last, the caponizer searches for the testes, each about the size of a grain of rice, and rips them free of their connective tissue with a small slotted spoon ”“ or, in some cases, a tool made out of a loop of horse hair.

This is the most difficult part: The testes are delicate, and it’s easy to only partially remove them, allowing some production of the male hormones that will result in a useless animal known as a “split” — not a rooster, not yet a capon. The testes are also next to a crucial artery and the kidneys, and damaging either could kill the bird. The incision is not sutured, and the entire process is done without anesthetics or antibiotics (though it should be said that neither anesthetics or antibiotics are used the more routine castration of cattle or pigs).

When asked, Keough shrugs off concerns that the process could be done more safely or humanely. “There’s not any other way to do it, and I don’t think there should be,” he says. “If you do it right, it only takes a few seconds and the bird doesn’t know what hit him.”

By the time Keough mastered the process as a teenager, he could caponize 300 birds an hour. But to get it right? It took him two or three thousand attempts, he says. “There were plenty of dead chickens laying around,” he remembers. In other words, farming capons depends upon a highly-trained, well-paid specialists — not the sort of assembly-line labor and mechanization on which the modern poultry industry runs. When Keough graduated from high school in the 1960’s, he could charge $75 an hour for his services, he says. “If I did it now, I might get rich,” he adds, wistfully. “But I spent it all. Girls… ”

Even once the flocks have been caponized, they still present challenges to the contemporary farmer. Jim Schiltz, who owns specialty poultry processor Schiltz Foods, struggles to get his suppliers to meet even the modest demand for capons. FDA inspectors maintain extremely strict standards for what can be sold as a capon, and for flocks to make the grade, “you need to give them a little TLC. You need to give them a space. You need to feed them slow,” says Schiltz. If a bird isn’t certified as a true capon, it can only be sold as one of those mammoth roasters that don’t fetch a high enough price to justify raising the bird for 17 weeks (conventional chickens are often slaughtered after as few as four weeks).

“You need to give them a little TLC. You need to give them a space. You need to feed them slow.”

Schiltz says he’s often at loggerheads with farmers ”“ many don’t bother to fill his orders, exasperated with the level of care required, while others cut corners, raising flocks where only half the birds can be sold as capons. “They’re crap, y’know. I don’t even want them, hardly,” he says, sighing. “There’s an art to doing this.”

Schiltz could take the time to whip his farmers into shape, train more caponizers (he says he knows only six people up to that task) and modernize the process if there was stronger demand for the birds. But it’s always been a niche product, and the market has only shrunk. Wapsie at its peak processed 500,000 capons per year, and Schiltz estimates his annual capon production is a tenth of that. In contrast, American farms routinely produce more than 8 billion chickens each year.

How is it that the capon has been left behind even as consumers demand a greater range of choice? Founder of specialty food brand D’artagnan Ariane Daguin believes it’s a question of demographics. A hundred years ago, when Beuoy prophesied a capon in every pot, American families averaged around five members, and so a seven to twelve pound bird was a reasonable size for a family meal. Now the average family has fewer than three members. So, says Daguin, “the capon is becoming obsolete.”

She, like Schiltz, simply tries to service a lingering demand: D’artagnan sells fewer than 2,000 of its $89 French-style capons, fed milk and bread instead of grain, to the small number of European expatriates who don’t traditionally eat turkey at holidays.

I brined and roasted one of Jim Schiltz’s 7.5 pound capons according to a simple recipe by Gabrielle Hamilton of New York City’s Prune restaurant, and the first taste was a revelation. The flavor was unusually rich and complex, distinct from any chicken or turkey I’d had before, and the texture both moist and firm. After years of bland chickens and dried-out holiday turkeys, a taste of capon made me wish George Beuoy’s vision of the Capon of Tomorrow had come to pass.

But developing a mass market for capons would require a Herculean marketing effort the producers currently show no inclination to undertake. And without that public awareness, it’s unlikely the same level of feel-good publicity that makes humanely raised chicken a supermarket staple will come to bear on the caponization process.

With the limited prospects for their products, many capon producers don’t bother touting the jaw-dropping taste of their birds. In the words of Jim Schiltz: “It’s just a chicken with its nuts cut off.”