Not to be a buzz kill, but, this is from the Milk and Dairy Products FAQ
from Colorodo's Department of Public Health and Environment
web site:Can raw cows’, goats’ or sheep’s milk be purchased for human consumption in the State of Colorado?
No, raw cows’, goats’ or sheep’s milk cannot be purchased for human consumption in the State of Colorado. The sale of raw milk in the State of Colorado is illegal. http://www.cdphe.state.co.us/cp/dairy/Dairy_FAQs.html
Yes, I know that it does not address "Cowshares", but that loophole is an increasingly dubious semantic. So much so, in fact, that new legislation is being introduced in Colorado, to specifically allow them. But to my knowledge, such legislation has yet to pass.
I would also look here:http://www.cdphe.state.co.us/release/2009/040709.html
The reason I bring this up is because the Cowshare programs in Ohio are under intense scrutiny as they are essentially ways to get around the law.