Sloths are far more adaptable than we realised
(PHYSorg.com Biology)

Unless you live in the tropical rainforests of South or Central America, most of the sloths you`ll encounter will be two-toed sloths. This is because they are able to eat quite a varied diet and are therefore relatively easy to keep in captivity. Their relatives, the three-toed sloths, on the other hand, have a very restricted diet, subsisting solely on Cecropia: a group of fast-growing tree species with soft wood and large, juicy leaves.