There is a good deal of information about dairy goats online. A quick search of the Web will turn up thousands of dairy goat sites. Just a few are listed here. Remember that perspectives on dairy goats vary by region in the U.S. For example, coccidia is not a problem for adult goats in the cooler climates of the Northeast and Midwest, but can be a problem in the Southeast, where winters are too mild to keep the microorganism in check.
The Georgia Dairy Goat Breeders Association is a local ADGA affiliate.
The American Dairy Goat Association (ADGA) is the primary national organization for dairy goat breeders.
The Dairy Goat Journal is a very nice monthly.
Langston University is a leading goat research center in the U.S.
The Goat Community Web Ring lists 300+ goat-related sites. A favorite of ours is Jonathan Ballard's "Goats Rule!" site.
(The Dairy Goat Journal, cited above, is another source for books on goats.)
The New Goat Handbook is a nice little paperback.
Goat Medicine is co-authored by Dr. Mary Smith, arguably the country's leading authority on the topic. Keep in mind, though, that Dr. Smith is based in New York. If you operate in a different locale, your experience may differ.