I don't know why they do that, but I've seen it done many times. We always joke that the girls are jealous.I had a bit of oddness in the barn this morning. One of my Cochin boys decided he wanted one of the Cochin girls that isn't laying yet. So, he hopped on...I thought, cool I guess she'll be giving me eggs soon. Out of nowhere one of my RSLs and one of the Wyandottes, who both lay eggs, ran over and beat the crap outta Smoke, till he got off Boots. They ripped on his comb, and pulled out head feathers. Isn't that weird? Why would they do that?