DD had this same problem, and it got worse! She has cochin bantams and when the THIRD one went broody she had musical mamas with eggs at different stages. Then the first batch hatched and another mama abandoned her nest to take care of those chicks. It was a mess!!
Solution? We finally put each broody in it's own cat box. out of sight/out of mind. These hens are really not too bright, especially under hormonal influence. I would put each of yours in it's own box/cave/whatever so it can concentrate on her own eggs however many or few you want to give her.
Once they all hatched, everyone was co-parenting but getting the hatches accomplished was tricky. I'd separate!
Solution? We finally put each broody in it's own cat box. out of sight/out of mind. These hens are really not too bright, especially under hormonal influence. I would put each of yours in it's own box/cave/whatever so it can concentrate on her own eggs however many or few you want to give her.
Once they all hatched, everyone was co-parenting but getting the hatches accomplished was tricky. I'd separate!