I have 26 chickens, assorted breeds and sex, 14 of the 26 are14 weeks old tomorrow, not sure of sexes yet. the other 12 are adults, 11 hens, 1 rooster. They are in a moveable coop with 1600 sq ft of grass area to forage in. We move it every 3- 4 days to fresh grass. My question is: whenever I enter the run, which at this time I have to step over the fence, the chickens all gather under my feet, and peck my boots, pants legs. They wont leave me alone to fill feeders and waters. Is this normal? The older ones didn't used to be this aggressive, but the younger ones have always been this way. They were all joined together about 1 month ago.