And then himself.
See the story in today's NYTimes. Peter Applebone is fairly restrained in his piece on the suicide of a 59-year old dairyman north of New York City. The article says 51 cows is about the limit for a single person. My uncle ran a similarly sized dairy by himself, at least until his barn burned and he had a heart attack. That tells me there's not been much productivity improvements over the last 60 years, except of course the cows these days probably produce 2-3 times the volume of milk. But milking 51 cows, minus those dry, twice a day, every day of the year is an intimidating prospect. It scared the hell out of me. And at 59, and alone. (Dairy isn't the most social occupation.)
I assume he raised his cows from calves and he knew them, knew their personalities. That hurts. [Paragraph revised to clarify.]