While the chimp's treatment is disturbing, Azalea isn't the first animal who's been trained to smoke. In 2015, a chimp in the Tianshan Zoo in China was seen chain-smoking, using the butt of his old cigarette to light a new one.
The Korean Central Zoo, where Azalea lives, also has a monkey who shoots basketballs, dogs who "solve" math equations on abacuses and doves who perform with a woman skating in an indoor stage.
"Azalea is just one more example of a sentient individual being used for our entertainment and pleasure, to their detriment," Bekoff said. "Is her smoking any more injurious to her health and dignity than other forms of mistreatment? I'm not so sure it is. But it provides a good rallying point for people who want to improve the lives of captive animals."