I have two male bq chicks. They are 6 weeks old, one blue and cinnamon, one silver. They were incubator hatched, and reside temporarily in a 10 gallon aquarium. Fed chick starter currently. Just gave them bird seed and millet spray for the first time the other day. Okay, my question is growling! Why are they growling at us? Well, not necessarily at us, but when we are in the same room, they growl. If we walk up to the tank, they stop, then when our backs are turned, growl growl. Are they territorial, wanting hens? They are also very vocal with the crowing, which we love. They can hear their parents nearby, but not see them. Thanks for any advice!