I've had my two guineas since about late May-early June. I raised them as keets and they've been with the chickens for the longest time. I have one white and one pearl. My cochin rooster used to constantly mate with the pearl guinea & so I always thought it was a female. But after doing some research and listening to their calls I've realized the oearl is a male and the buff guinea is a female. So why was my cochin mating with a male guinea? Was it a dominance thing? You hardly ever see the guineas and the cochin roo separated and the male guinea acts sorta like a body guard for the roo. He's actually quite aggressive sometimes.