The article doesn't mention it, but I wonder if there isn't a fourth: 4. Having little muscle mass, and with more than a third of their body weight being half-

The article doesn't mention it, but I wonder if there isn't a fourth: 4. Having little muscle mass, and with more than a third of their body weight being half-digested leaves, there's not much worth eating. Surely a sloth is not the primary prey of any predator. More of a desperation move?