SAN BERNARDINO, Calif. (AP) — Two former slaughterhouse workers were charged Friday with abusing ailing cattle in a case based on undercover video footage showing crippled and sick animals being shoved with forklifts.

Bench warrants for the arrest of Daniel Navarro and Luis Sanchez were issued after they failed to appear for arraignment. Prosecutors did not know if they had retained lawyers.

Authorities said Navarro and Sanchez were seen in the Humane Society video, which showed workers kicking, shocking and otherwise abusing "downer" animals that were apparently too sick or injured to walk into the slaughterhouse. Some animals had water forced down their throats, San Bernardino County District Attorney Michael Ramos said.

The slaughterhouse in Chino is operated by Westland/Hallmark Meat Co., which supplies meat to the federal school lunch program and to major hamburger chains. The U.S. Department of Agriculture suspended operations at Westland/Hallmark after the video surfaced earlier this year, and lawmakers in Washington called Thursday for an investigation.