I have 6 guineas ranging 11-13 weeks old. They seemed to pick on one every once in awhile. The other day I lost a guinea to a neighbors dog and since the Guineas are really going after the smallest one. I’ve seen them bite and pull feathers out. I’m not sure of all their sexes yet. The smallest is attacked when they are near food, water, or just gets too close to the flock. Is this normal? What should I do?