I currently have four 19 weeks chickens and just got two 10 week old chickens. I have the two little ones in a separate area within their run and I occasionally see the older chickens trying to peck at them. As of right now they do not sleep in the coop with the older chickens as the younger chickens have a separate sleeping. But as I am researching some people say to place the younger chickens in the coop with the older. I am not sure if this is a good idea. The older chickens tend to stalk and walk around the fenced area where the younger chickens. They seem to wait for the younger chickens to make a mistake (like stick their head out of the fencing or get to close to the fence) and peck at them. I am not sure if this is normal or are my older chickens just really mean?!!?!? Even when they are free ranging the older ones will run to the enclosed fenced area where the younger chickens are and pace around the fence trying to peck them!
So my questions are:
1. Should I be putting the younger and older chickens together at night to sleep
2. How long should this process take (when will it be safe for the younger ones to be with the older ones)
3. Is the behavior of my older chickens normal or is this normal behavior?
p.s. I did try to let them free range with supervision and a little apart from each other but the older ones ran to them and started to peck at them mercilessly