McClelland's Dairy is an organic dairy farm that specializes in European style butter. Its dairy products can be found in over 24 nearby cities and numerous restaurants, as well as 5 Petaluma grocery stores. The dairy prides itself on its humane treatment of its cows, all of which live in healthy, relaxed conditions and are hormone and antibiotic free. McClelland's offers dairy tours in which participants are allowed to milk the cows.