There are domesticated strains of water buffalo from Hungary, Albania, Bulgaria, and Italy that are very adapted to a cold climate.
This dairy is used to make mozzarella di bufala (buffalo mozzarella).
I erroneously believed that all mozzarella came from water buffalo.
Considering how uncommon water buffalo are in the West, that was a pretty stupid assumption, but the only “true” mozzarella comes from water buffalo.
More on dairy buffalo: