How often do chickens breed? It seems like that's all the roosters do is jump the hens. Sometimes it's 1 on 1 and other times 1 roo will grab a hen by the neck and another will jump her. Is that normal? Will they hurt them doing it so often? It seems like that's all the roosters are doing! I was told that roosters will "do it" up to 40 times a day. Is that true?