The answer to your questions about cows and managing a dairy operation can be found at: http://www.adds.org.
This Web site houses a dairy database with information ranging from animal welfare, business management to grazing and reproduction. The site is maintained by the "Agricultural InfoBases for Decision Support" and contains information from universities, government researchers, as well as private companies.
If you have a computer, but do not have access to the Internet, you can purchase a CD containing the databases for $99. For more information, call ADDS at (608) 848-9055.