I dont know if it is because they are still young (11 weeks old) or maybe because they were raised with chickens and ducks since they were day old meets, but I have yet to see the "tight formation flocking" behavior. They kind of just mosey about some with follow another chicken others will go a few yards away from the rest of the flock to peck around 1 my fly up a ways and roost on the satellite dish or the hen house. Basically they act just like my chickens. Even when I let them free range they dont range hardly any further than a 20 foot radius from the coop and never have too much trouble getting them back in the coop. I do occasionally have a couple guineas fly the coop to roost on the satellite dish (since it is right next to their fence), and then jump back in the coop (unless they jump on the ground and cant figure out how to get back in the coop so they pace the fence. Will they change to stereotypical guinea behavior when they are older?