Dominant male rhinos use dung as a kind of signpost–a thinly-veiled threat to rivals to stay away from their territory, backed up by hormone-infused fecal proof of their health, status, and dominance.

Captain is an Anatolian guard dog responsible not only for protecting his master’s herd of goats. He’s also indirectly causing fewer cheetah deaths by deterring them from even considering an attack.