If you have (adult) males from 2 different sources chances are they will fight, and the Hens may join in too... adult Guinea flocks usually are not very accepting of new additions without an introduction period. So if possible I'd house them side by side for at least several weeks to let them get used to each other first, but thru the protection of the wire separating them. With both groups being new, and in a new situation you may not have any issues (plus there only being 5 of them), their fear and stress of being re-homed may over ride their naturally aggressive/protective behavior and they may accept each other fine and stick close together for security. See how it goes, but be ready to separate everybody if you need to. Once they start fighting and blood is drawn it can continue to the death, or the worst injured bird can end up being cannibalized by the rest (both male and females Guineas are attracted to peck at blood/wounds).