guinea fighting around this time of year is completly normal. in the spring they will do it even more. there trying im impress the female. i have 3 males and 1 female and so far i havent seen anything yet but i know its gonna happen here in the next few months. when i had a few guineas, and they were all males, they all ganged up on the chickens. they attakced and almost killed some of my roosters and little chickens. i got rid of most of them and just kept two and that seemed to help. they just keep to themselves now and hang out with the female, but in the spring i know mine will be chassing eachother and fighting with eachother.