Net income fell by 15 percent for the second quarter, ending March 28, compared to the same period the previous fiscal year, Tyson reported.
The coronavirus pandemic has forced the company to close several plants and slow production as hundreds of workers test positive for the virus.
"We have and expect to continue to face slowdowns and temporary idling of production facilities from team member shortages or choices we make to ensure operational safety," Tyson said in a statement.
It started a limited reopening Monday of a pork plant in Logansport, Indiana, where nearly 900 employees tested positive.
"There have been some shortages in some specific categories," CEO Noel White told analysts on a conference call.
"As you’ve likely heard, beef suppliers across North America are currently facing production challenges," according to a Wendy's statement. "Because of this, some of our menu items may be in short supply from time to time at some restaurants in this current environment."
The country's capacity to slaughter hogs has dropped by about 50 percent from pre-pandemic levels, according to Tyson President Dean Banks.
A focus of the nation's struggling pork industry has been Sioux Falls, South Dakota, where more than 800 employees tested positive at a Smithfield Foods plant.
Some workers filed back Monday, but not before going through a tent where their temperatures were taken and they were screened for symptoms of COVID-19, the disease associated with the coronavirus.
About an hour east of the Smithfield operation, a JBS USA pork plant in Worthington, Minnesota, also planned a partial reopening on Wednesday.
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Joe Biden, the apparent Democratic presidential nominee, said Monday that he feared for those meatpacking workers.
He called meat production plants — where employees had been working long hours, often shoulder to shoulder — and nursing homes "the most dangerous places there are right now."
"They designate them as essential workers and then treat them as disposable," Biden said of the meatpackers.
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The Centers for Disease Control and Prevention issued a report Friday revealing that more than 4,900 workers at meat and poultry processing facilities have been diagnosed with the virus.
At least 20 have died, and the CDC said not all states have provided data, so the grim numbers are probably much higher.