I'm a vegetarian, but if you want to eat meat as humanely as possible, here is some info. These sources would also be better for the environment.
Whenever people ask, "Where can I get pasture-based meats like yours in my area?," I tell them to go to eatwild.com. Maintained by food writer extraordinaire Jo Robinson, it's the definitive clearinghouse for livestock raised the old-fashioned way—outdoors, with on-site pasture grass, instead of inside facilities. Editors recommend Eat Well Guide, where you can find local and organic farms in the United States and Canada. The American Grassfed Association has information on local grass-fed-beef producers, as well as recipes.