OKLAHOMA CITY (AP) – A Kansas-based pork producer strongly disputes allegations it is mistreating pregnant pigs by keeping them in so-called “gestation cages.”

The Humane Society of the United States lodged the allegations Tuesday against Seaboard Foods and North Carolina-based Prestage Farms. The group cited a video they say showed pigs standing or lying in cages and workers cutting the tails off piglets at production facilities in the Oklahoma Panhandle.

At a news conference in Oklahoma City, Paul Shapiro with the Humane Society said investigators worked for both companies and videotaped the conditions late last year.

Ron Prestage is a veterinarian for Prestage Farms, founded by his father. Prestage said in a statement that the company is committed to sound animal care.

Seaboard officials say they’re pleased that their employees are following proper industry-supported protocols and procedures.