Was it this one? http://www.floridarambler.com/funky-flo ... -roosters/
Personally, I think that people make too much out of birds' poop. It's not 'dirty' poop like a dog's or a cat's - the only nasty poop comes from carnivores, herbivores poop is mostly water and, whatever is left dissolves easily with water so what is the big deal?