I haven't heard the 2 syllable sound at all from my two guineas so I have assumed they were both male. They look pretty similar in head, but one has more coloring than the other. They're about 8 months old. BUT, I have noticed my chicken Roosters "mating" with one of the guineas quite a bit (like whenever the chicken hens aren't in the mood) So, despite the lack of the "buckwheat" sound, could I still have a female? Or are my 2 roosters just jerks?????