Sumatran tigers, like all tiger species, are endangered. Many people think it’s fine to breed tigers in private menageries and sanctuaries, like those featured in the documentary series “Tiger King,” to bolster population numbers. It’s not. Often, private big-cat petting zoos and sanctuaries breed animals for the petting purposes and kill them when they age out. Moreover, their existence keeps the black market thriving, which encourages impoverished people who live in places like Sumatra to poach. Lastly, tigers born in non-accredited private zoos are often inbred, don’t have the genetic diversity to support regrowth, and can’t be released into the wild.