The lion, a 4-year-old male named Cous Cous, had been raised at Cat Haven since it was a cub, said Tanya Osegueda, a spokeswoman for Project Survival, the nonprofit that operates the animal park.
Since the 100-acre facility just west of Kings Canyon National Park opened two decades ago, it has housed numerous big cats, including tigers, leopards and other exotic species. It is permitted to house exotic animals by the California Department of Fish and Wildlife and is regulated as a zoo by the U.S. Department of Agriculture.
Results of the last 13 USDA inspections show no violations dating back to March 2010. The most recent inspection was Feb. 4.
Despite state regulations requiring annual inspections, the California Department of Fish and Wildlife most recently inspected the facility in January 2011, when the inspector found it in "good condition" after checking animal health and features such as enclosures.
"We have to do the best we can with the resources we're provided," said department spokeswoman Jordan Traverso. "Regardless of whether it was inspected, that wouldn't have prevented this from happening."
Cat Haven's current "restricted species" permit, which expires in November, states the park was authorized to house 47 animals but had only 28. The animals must be used for scientific or educational purposes.
Actress Tippi Hedren, who founded the Shambala Preserve in Southern California, home to 53 seized or abandoned exotic pets, expressed dismay over the killing of the lion.
"It wasn't the lion's fault. It's the human's fault always," Hedren said.
Nicole Paquette, vice president of the Humane Society of the United States, said the victim of Wednesday's attack should never have been in the enclosure with the animal.
"These are big cats that are extremely dangerous, and they placed a volunteer in the actual cage with a wild animal," she said. "That should have never happened."