What jobs is in a dairy?

There are a lot of different jobs in a dairy: milking, breeding, feeding, nursing calves, treating of hospital cows, assisting cows with calving, maintenance, etc. A small dairy (till about 200 cows) will have one or two people do all the jobs, a dairy that is larger will have more and more specified jobs. At a 1000 cow dairy or larger the milkers will just be milking and the feeders just feeding, etc.