There was some kind of cow art exhibition in New York involving cows.

There was a public art project involving cows...lots of them... in New York while we were there.  And here's a quote:

The cows are the brainchild of CowParade Worldwide Inc., an international organization comprised of Swiss and American concerns. They are life-size, fiberglass cows designed by local artists. CowParade is set to debut on Broadway on June 15, 2000. Through the efforts of CowParade Worldwide and the New York City Department of Parks and Recreation, the cows will appear throughout the five boroughs of New York City through Labor Day. Following the exhibition, the majority of the cows will be available to the public at auction with the proceeds earmarked for charity.