Mine seem a little confused on what the egg song is. All the roos start having a spazz attack and running around like, well, chickens with their heads cut off. All the hens are totally relaxed, and the roosters are freaking out. The only way to make them shut up is to whistle, works every time. I wonder if they're just hoping that it's not theirs!
I always thought they were claiming ownership. Screaming out "I'm the DAD"" "I'm the DAD" "I'm the DAD"