Hello all! I am a brand new chicken mama. I recently brought home 4 "pullets" from a local feed store, entirely due to ovewhelming impulse triggered by the unbearable cuteness of baby chicks. In the past few weeks, one of my "girls" has shown noteable aggressive behavior, an awkward sound I assumed was an attempted cock-a-doodle-doo but wrote off as a transitional cluck, and has begun to show noticeable physical differences from the others. Granted, all four are from different breeds and look generally different anyway. "Rosalinda" is an Araucana and is 12 weeks old. I have done a significant amount of googling to confirm my suspicionson, but I thought it best to enlist the help of more seasoned chicken parents. The most validating observation is the shape of the tail feathers. "Rosie's" feathers are pointed, undefined and curve at the ends, while the others have rounded, straight feathers. Other signs have included her red comb and different looking hackle feathers, but I just don't know enough about chickens to know if that is due to "her" breed or sex. Any opinions on this are appreciated. TIA!