We started raising chickens in February. I acquired a few chicks each week over the course of about 4 weeks until I had 16 chicks. The oldest ones are about 12 weeks old, the youngest about 8. I'm seeing no signs of a rooster. But my eye is untrained. It just seems the odds are pretty slim that at least one didn't turn out to be a rooster. Which is good by the way, we didn't really want one. A local chicken farmer told me to watch for aggressive behavior and spur development on the legs. I see some aggressive behavior (mostly in the Ameraucanas and Wyandottes) but nothing too crazy. What are some other things to watch out for?