Horse meat contaminated with barbiturates was blamed for killing a wolf and tiger and sickened a cheetah at a wildlife sanctuary here last month.

Triple A Brand Meat Co., based in Burlington, Colo., recalled the horse meat that was sold to 10 different zoos and wildlife sanctuaries nationwide, including Animal Ark in Reno, company partner Lindy Yager said Thursday.

Toxicology reports confirmed that the meat contained pentobarbital and phenytoin. Both drugs are considered barbiturates, according to the U.S. National Library of Medicine.

Pentobarbital is a drug used to euthanize animals, while phenytoin is an anti-convulsing drug used to treat seizures.

Triple A Brand Meat, which is certified by the U.S. Department of Agriculture, sells horse meat and beef, among other food products, to about 200 customers nationwide, Yager said.

“The horse meat was contaminated, so we stopped the production until we figure out how that got in there,” Yager said. “What they found in there was stuff used to euthanize horses.”