If you live and comute around downtown Austin, you have definately seen the decorated cows around town. They have been here since July, 2011 and are soon to be auctioned off at the end of this month (October ,2011).
Here is a link to the website for and about the cows. http://cowparadeaustin.com/
and some of the info from the website:
CowParade, the largest and most recognized public art event in the world, is currently in Austin. Currently, more than 45 cows are on display, with more to come in August. In October 2011, a select number of cows will be auctioned off and a portion of the proceeds will benefit the Dell Children’s Medical Center of Central Texas and Superhero Kids Fund.