A herd of cows stands in a pen after being sold at auction at the Kentucky-Tennessee Livestock Market in Guthrie, Kentucky, on March 12, 2015. MUST CREDIT: Bloomberg photo by Luke Sharrett.
A herd of cows stands in a pen after being sold at auction at the Kentucky-Tennessee Livestock Market in Guthrie, Kentucky, on March 12, 2015. MUST CREDIT: Bloomberg photo by Luke Sharrett. Credit: Luke Sharrett

The U.S. beef boom is probably over.

Thanks to tightening animal supplies and tepid demand, companies including Tyson Foods, the largest U.S. meat processor, and Cargill are facing plunging profits on every head of cattle they slaughter.

That’s a sharp reversal of fortune from last year, when the fastest expansion of the American cattle herd in four decades increased margins for packers. But, the herd growth didn’t last long. As a result, cattle futures in Chicago have rebounded 23 percent since bottoming in mid-October, while the price packers get for wholesale beef has tumbled in the past year amid stiff competition from chicken and pork.

Losses for U.S. beef packers expanded to $67.15 a head on Jan. 25, according to data from HedgersEdge.com. Profit per head reached an all-time peak of $147.20 on Oct. 18 and averaged $43.79 in 2016, the highest for any year in records going back to 1990.

The margin reversal may be a blow to Springdale, Ark.-based Tyson. In fiscal 2016, its beef segment rebounded to an operating profit of $347 million from a loss of $66 million a year earlier, with former Chief Executive Officer Donnie Smith calling it “a great turnaround story,” according to a statement on Nov. 21.

But it doesn’t look like the beef turnaround is certain to last. Analysts have lowered their consensus one-year target price for Tyson’s stock by 1.1 percent in the last month, data compiled by Bloomberg show. Tyson and Cargill declined to comment on their beef margins.

Beef processors have endured painful times before. Tyson and Cargill closed slaughter plants in the last several years after drought and higher feed costs forced producers to cull the national cattle herd to the smallest since the 1950s. Things started to improve as cheaper corn and better weather allowed for expansion over the last two years. A bigger U.S. cattle herd helps improve plant utilization, and processors were able to spread their costs across a greater number of animals. Demand for beef products also climbed domestically and internationally.

Tyson in November forecast beef-segment margins for fiscal 2017 would be at the upper end or above the normalized level of 1.5 percent to 3 percent. In the prior year, the margins were 2.4 percent.

Now, that goal is looking tougher based on the trend at U.S. feedlots, where 750-pound steer are placed on a corn-based diet for about five months and then sold at 1,300 pounds for slaughter.

At the same time, weak growth for U.S. beef demand has lowered the prices for which Tyson and other companies can sell their meat. Consumers have moved away from red meat amid health concerns, while booming supplies of chicken and pork have also made the alternative proteins more competitive.