Feeding them like you are feeding them will help the feathers that will grow back grow back nice and thick. It will not make the feathers that are not going to grow back before the molt grow back before the molt.
I don't know what extra protein you are feeding them. I personally do not increase protein for feather growth, mine do fine without that. But if you do, I'd suggest BOSS. BOSS is relatively high in protein but the big advantage is that Black OIL Sunflower Seeds have a lot of OIL in them. It doesn't take much but that oil helps make the feathers nice an shiny.
Frankly, the reason I'm suggesting BOSS is not for the chicken's benefit. It's for yours. As Aart said the chickens don't care, but it will make you feel better because you are doing something to help. The oil will make the feathers shinier, which is probably important to you, again a benefit for you.
As for behavior any time you add or remove a fairly dominant chicken you change flock dynamics. Sometimes for the better, sometimes not. I'm glad it's worked out better in your case.
I don't know what extra protein you are feeding them. I personally do not increase protein for feather growth, mine do fine without that. But if you do, I'd suggest BOSS. BOSS is relatively high in protein but the big advantage is that Black OIL Sunflower Seeds have a lot of OIL in them. It doesn't take much but that oil helps make the feathers nice an shiny.
Frankly, the reason I'm suggesting BOSS is not for the chicken's benefit. It's for yours. As Aart said the chickens don't care, but it will make you feel better because you are doing something to help. The oil will make the feathers shinier, which is probably important to you, again a benefit for you.
As for behavior any time you add or remove a fairly dominant chicken you change flock dynamics. Sometimes for the better, sometimes not. I'm glad it's worked out better in your case.