"BRIDPORT, Vt. - The cows at the Audet family's Blue Spruce Farm make nearly 9,000 gallons of milk a day ? and about 35,000 gallons of manure.

It's long been the milk that pays, but now the Audets have figured out how to make the manure pay as well. They're using it ? actually, the methane that comes from it ? to generate electricity."

http://news.yahoo.com/s/ap/20060630/ap_on_sc/farm_scene_cow_power_1

Pretty soon I expect someone to come up with a use for the moo and we'll have total bovine utility.