Tonka was only a baby when his mom was tragically hit by a car, and he was taken in by the sanctuary in Townsville, Australia. In 2011, Billabong was hit by a cyclone and required massive repairs. All of this change and heartbreak was too much for sensitive Tonka. Now, back at the repaired sanctuary, the staff deals with Tonka's depression the best they know how - with teddy bears.
"Animals that are clinically depressed likely have the same problems as do humans with the condition - the brains of all mammals are remarkably the same," Kenneth B. Storey, a professor of biochemistry at Carleton University, told The Dodo.