Petistic, one of my favorite blogs, points to a BBC report about farmers and language specialists who’ve identified regional accents among cows:
"In small populations such as herds you would encounter identifiable dialectical variations which are most affected by the immediate peer group."
Dr Jeanine Treffers-Daller, reader in linguistics at the University of the West of England in Bristol, agreed that the accent could be influenced by relatives.
She said: "When we are learning to speak, we adopt a local variety of language spoken by our parents, so the same could be said about the variation in the West Country cow moo."