Dave Thrush took this photo of bears wrestling at the Wild Animal Sanctuary in Keenesburg on May 15, 2013.
The Wild Animal Sanctuary
A lioness yawns in a "free roaming space" at The Wild Animal Sanctuary on Oct. 20, 2011 in Keenesburg. The non-profit sanctuary is a 720-acre refuge for large carnivores that have been confiscated from illegal or abusive situations and is currently home to over 290 lions, tigers, bears, wolves and other large carnivores. It is the oldest and largest carnivore sanctuary in the United States, having been in operation since 1980. (Photo by John Moore/Getty Images)
The Wild Animal Sanctuary
The Wild Animal Sanctuary
Wild Animal Sanctuary
A walkway for visitors that is located above the animals opened in 2012. (credit: CBS)
The Wild Animal Sanctuary
The Wild Animal Sanctuary
Lions At The Wild Animal Sanctuary
The Wild Animal Sanctuary (Photo by John Moore/Getty Images)
The Wild Animal Sanctuary
The Wild Animal Sanctuary in Keenesburg, Colorado. (Photo by John Moore/Getty Images)
The Wild Animal Sanctuary
The Wild Animal Sanctuary
Rescued brown and black bears feed at The Wild Animal Sanctuary on October 20, 2011 in Keenesburg, Colorado. The non-profit sanctuary is a 720 acre refuge for large carnivores that have been confiscated from illegal or abusive situations and is currently home to over 290 lions, tigers, bears, wolves and other animals. Opened in 1980, it is the oldest and largest carnivore sanctuary in the United States. Animals at the refuge require a total of some 19,000 pounds of food per week, a ton of that for the bears alone. On Tuesday the owner of a private 73 acre animal reserve in Zanesville, Ohio set loose 56 animals, mostly large carnivores, before shooting himself. Of the animals that fled, 49 were hunted down and killed by sheriff?s deputies and other law enforcement officers. (Photo by John Moore/Getty Images)
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
Animal caretakers throw chunks of meat while feeding tigers at The Wild Animal Sanctuary on Oct. 20, 2011 in Keenesburg. The non-profit sanctuary is a 720-acre refuge for large carnivores that have been confiscated from illegal or abusive situations and is currently home to over 290 lions, tigers, bears, wolves and other large carnivores. It is the oldest and largest carnivore sanctuary in the United States, having been in operation since 1980. (Photo by John Moore/Getty Images)
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
Grizzly bear (Photo by John Moore/Getty Images)
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
The Wild Animal Sanctuary
A wolf eats at The Wild Animal Sanctuary on Oct. 20, 2011 in Keenesburg, Colorado. The non-profit sanctuary is a 720-acre refuge for large carnivores that have been confiscated from illegal or abusive situations and is currently home to over 290 lions, tigers, bears, wolves and other large carnivores. It is the oldest and largest carnivore sanctuary in the United States, having been in operation since 1980. On Tuesday the owner of a Zanesville, Ohio private animal reserve set loose 56 animals, of which 49 were hunted down and killed by law enforcement and six others were tranquilized and are being treated at the Columbus Zoo. (Photo by John Moore/Getty Images)