Because sloths' metabolisms are so slow, they don't exhibit many external signs of stress and it can be hard to determine their mood.
Ann BurtonEvery move a sloth makes is with purpose, which is more than most of us can say about 90% of the time.
Ann BurtonSloths have low metabolisms, so they have to move slowly in order to conserve energy. However, they aren't aimless or "lazy" and they actually move around quite a lot - just very, very slowly.
Ann Burton