This is where I wish I had a ton more experience. I can see what's going on. I'm dealing with the symptoms but the underlying cause baffles me.
I lost 2 birds in 2 weeks & the flock barely missed a beat. I lose 1 & chaos erupts. Part of the problem is I seem to have no lead hen ~ not really. It should be Hepzibah, but she hasn't cared for the position [she's always been a bit of a loner] & abdicated. She also looks like she's thinking about going broody now the warm weather's arrived. She really is a bit of a nut job but I'm particularly fond of her nuttiness. Soda is trying her best but she suffers from *youngest child syndrome* & doesn't really have the authority. She also has Suyin, Lavender & occasionally Patricia constantly trying to usurp her authority. The one hen, when she can be bothered, who is able to put my troublesome middle trio in their place is Luna ~ & mostly she can't be bothered. This is leaving my bottom 3 particularly vulnerable. It seems to be a squabble for 2nd in command but all 3 hens are fairly equal in size, ability & dominance ~ & none of them would be my choice because of that tendency to bully. Luna is bigger & heavier, so can assert her dominance without causing injury, but she is a super calm, easy~going bird who is able to happily go about her business without interference from anyone else ~ which she does, while the flock squabbles around her.
None of my present hens have the really strong personalities my Australorps had ~ but I don't want more Aussies either. They're lovely but they have dominance issues & as I really want more Campines, who don't...
It is frustrating as I want to add new birds next year so I want my flock calm & stable enough to deal with the stress new birds always bring.