Hi, we have 3 hens about 1.5 years old. We just integrated 4 pullet silkies that are 3 months old approximately 3 weeks ago. They are all in the same run now and get along fine but they don’t act like a flock. They are acting like 2 separate flocks. The 3 older hens “hang out” together and the 4 silkies “hang out“ together. Is this normal? I’ve never had this happen before. Thanks so for any info about this