Last time I introduced you to my parents' sheep.
My parents also have a llama named Nick:
Nick is a guard llama. His job is to protect the sheep from coyotes, dogs, and other predators.
Before my parents brought Nick home, they had him "fixed." Or "nicked" as it were.
Nick is a eunuch of sorts. He's been castrated and it's his job to guard "the harem." So "eu-nick" because he got "nicked"... "Nick" became his name.