These girls (at least we think they are girls) are two of three NH Reds that are about nine weeks old. They get along fine most of the time, they snuggle up in the coop either on the floor or on their perch but when we let them out into the run they run around chasing each other and sometimes one of them ruffles its neck feathers like this. What does it mean? After they do that they settle down in harmony again until nightfall when they go back into the coop and we latch the doors. We let them out around 2 or 3pm and sunset is about 9.00 as we are in the southern hemisphere. Thanks for any comments.