I am thinking of getting 2 guinea hens. Right now I have 15 chickens and 1 rooster. This is my first flock of birds. The chickens I have right now are 5 months other. The guineas will be about the same age. Is it OK to put them together in the same chicken coop? My coop is 6x8. But they only sleep in there. I let them free range all day. Let me know any advice you may have!