2 should be plenty. The idea is to have enough that no one can block them all. I have 2 in the big run (1 on a haybale and one hanging on the otherside) and 1 in the coop. No one can black them all so everyone can be guaranteed a place to eat.I am beginning to realize how lucky I am. I had only one feeder for my 3 princesses. I just increased it to two, but only because I was designing the Chicken Palace and there was a sort of 'extra space' that felt like a feeder would look good. It seems to me like everyone eats. In fact, I would be hard pressed to say that any of them do much more than eat (interrupted only by the odd nap, and dust bath). Mind you they do feel thin to me, but I never see squabbling over food. I may add another feeder just in case anyone is missing out when I am not watching.