Hi, I recently purchased 6 chicks from my local feed store. At 7 weeks, one of my Easter Eggers began to crow. The same feed store sells pullets between the ages 2-3 months. Is it okay to add one older pullet to my existing flock? Should I get rid of my cockerel before adding the new pullet? I have a place for quarantine and an old dog pen that can be placed into the run to slowly introduce her to my existing flock. All ideas and opinions are very much appreciated.