Armoiricanis are a type of very old cattle (like cows) that used to live in a place called Armorica, which is now part of France. They're special because they're quite small and very tough, which means they're good at handling things like tough weather and being outside for a long time.
People used to keep Armoiricanis to help them with their work, like plowing fields, carrying things, and giving milk. Nowadays, though, they're mostly just kept because they're unique and fun to look at.