I have a buff orpington hen that is the first of my cluckers to start brooding and attempting to hatch some eggs. Every time she leaves the nesting box to feed and drink, she is met by a few members of the flock that challenge her. Fortunately she has been able to stand them off before retreating back to the nest. Can someone please tell me what is happening here? Normal or not? She has about 15 days or so to go. Also, if nothing happens should I pull her off the nest and discard her eggs?