I have 2 guineas. I believe one is a male and the other is a female. Yesterday I caught my black australorp rooster fighting with a guinea. My rooster is beautiful with a big red comb and waddles. Well now his comb is damaged from the guinea getting a hold of it with its beak. Not sure who started the fight and why but I do know the guinea did not back down, in fact at one point the guinea chased the rooster off. Maybe the rooster (He is young) tried mating the guinea and she wasn't having it??