When she was in Scottland, my Sister saw pink(!) sheeps from time to time. A little girl explained to her that those were male sheeps, and the color was used to find out with which female sheeps they mated.
Instead of shooting the sheep, you could be a male sheep making female-sheeps pink - or the other way around. Might make more sense than shooting the sheep :-D
(being a sheperd's dog and trying to turn the sheeps around might also be a nice angle.)
I currently try to distribute lots of nature in an existing game of mine - will find out if that works :-)