I have a small flock of three Orpington’s. The top hen is a lot older than the other two at 45 weeks the other two are 17 and 18 weeks. The top hen has been picking on the 17 week old smaller one a bit more than usual lately by plucking out her tail feathers. No blood or bald patches. The in between one gets pecked too, but still has her tail feathers. I have some anti-pecking spray I will try if I can catch the little one.,.hard because she’s so scared. Any advice? I thought perhaps I could lock the big one in the run and coop for a couple of days and just let the two younger ones free range but does that actually work? Or is this just normal pecking order behaviour? It seems a bit harsh. Thanks.