We pruchased two guinea fowl, one barred rock rooster and 2 barred rock hens, all 3 weeks old. Everything was wonderful, when they started to mature the rooster kept everyone in line, the guineas began to spar but the rooster would step in before things got out of hand. I began to realize my guinea fowl were both males. Then one day rooster tried to stop the sparring and they beat the crap out of him, there was blood everywhere. That was the day I had to separate them. The guinea are extremely high strung, the males have to show off ALL THE TIME and yes they do have mob mentality. If you know and understand that you'll love them but for those that have no experience or have not researched you may hate them. They are nearly wild even if handled daily. Not all of course but be prepared, read what people say about them its not a exageration. I learned the hard way but I was very lucky to find a home of lots and lots of hens and they still after 3 years are living happily ever after. Oh yeah, THEY ARE LOUD!!!!