Hog farmer Mike Patterson's animals, who have been put on a diet so they take longer to fatten up due to the supply chain disruptions caused by coronavirus outbreaks, at his property in Kenyon, Minnesota, U.S. April 23, 2020.

With the pandemic hobbling the meat-packing industry, Iowa farmer Al Van Beek had nowhere to ship his full-grown pigs to make room for the 7,500 piglets he expected from his breeding operation. The crisis forced a decision that still troubles him: He ordered his employees to give injections to the pregnant sows, one by one, that would cause them to abort their baby pigs.

Van Beek and other farmers say they have no choice but to cull livestock as they run short on space to house their animals or money to feed them, or both. The world's biggest meat companies - including Smithfield Foods, Cargill, JBS USA and Tyson Foods - have halted operations at about 20 slaughterhouses and processing plants in North America since April as workers fall ill, stoking global fears of a meat shortage.

Van Beek's piglets are victims of a sprawling food-industry crisis that began with the mass closure of restaurants - upending that sector's supply chain, overwhelming storage and forcing farmers and processors to destroy everything from milk to salad greens to animals. Processors geared up to serve the food-service industry can't immediately switch to supplying grocery stores.

Millions of pigs, chickens and cattle will be euthanized because of slaughterhouse closures, limiting supplies at grocers, said John Tyson, chairman of top U.S. meat supplier Tyson Foods.

Pork has been hit especially hard, with daily production cut by about a third. Unlike cattle, which can be housed outside on pasture, U.S. hogs are fattened up for slaughter inside temperature-controlled buildings. If they are housed too long, they can get too big and injure themselves. The barns need to be emptied out by sending adult hogs to slaughter before the arrival of new piglets from sows that were impregnated just before the pandemic.

"We have nowhere to go with the pigs," said Van Beek, who lamented the waste of so much meat. "What are we going to do?"

In Minnesota, farmers Kerry and Barb Mergen felt their hearts pound when a crew from Daybreak Foods Inc arrived with carts and tanks of carbon dioxide to euthanize their 61,000 egg-laying hens earlier this month.

Daybreak Foods, based in Lake Mills, Wisconsin, supplies liquid eggs to restaurants and food-service companies. The company, which owns the birds, pays contract farmers like the Mergens to feed and care for them. Drivers normally load the eggs onto trucks and haul them to a plant in Big Lake, Minnesota, which uses them to make liquid eggs for restaurants and ready-to-serve dishes for food-service companies. But the plant's operator, Cargill Inc, said it idled the facility because the pandemic reduced demand.

Daybreak Foods, which has about 14.5 million hens with contractor-run or company-owned farms in the Midwest, is trying to switch gears and ship eggs to grocery stores, said Chief Executive Officer William Rehm. But egg cartons are in shortage nationwide and the company now must grade each egg for size, he said.

Rehm declined to say how much of the company's flock has been euthanized.

"We're trying to balance our supply with our customers' needs, and still keep everyone safe - including all of our people and all our hens," Rehm said.