Cougar Mountain Zoo 2009, Peter Rittler continued in the zoo's management. The zoo collection features 32 exhibits of animal habitats concentrating on endangered species such as tigers, lemurs, wolves, reindeer, cranes, wallabies, macaws, and cougars, among others. On June 16, 2007, the zoo acquired two male Bengal tiger cubs, a royal white and a golden, who were born eight weeks apart in a Florida tiger preserve. The zoo added an additional two cubs in 2009. A glass-walled tunnel called the "Tiger Tunnel" enables visitors to view tigers in close proximity. In 2011, a 370-pound (168 km) tiger was photographed holding his paw up
Hip replacement (animal) condition, since they are irreversible and carry risk. Conditions such as hip dysplasia and arthritis can often be treated with appropriate medications that help the body handle pain, inflammation, or joint wear and tear. Animals which are prospective candidates for hip replacement should have no other spinal, neural, or rear leg abnormalities, in order to be significantly helped by a hip joint procedure. Since the reduced joint mobility seen in conditions such as dysplasia may result in loss of muscle mass and quality as a dog ages, there is often an advantage in having hip replacement whilst the dog is