I think their personalities do change. My buff Brahma was four before I could pick her up and love on her. I’ve had a total of 21 chickens so far in my chicken keeping life and she’s the only one who seems to want and like snuggles. I think it all depends on the chicken!I'm super jealous over here! I have no clue why but my hens don't like to be picked up or cuddled. We can pick them up but they are not huge fans. I do have a black australorp who is starting to sit for a few minutes and close her eyes when I pet her but still no longer than 5 min TOPS. They run up to me, talk non stop and follow me everywhere. But just don't like physical affectionWill that ever change??