When can reintroduce aggressive mother hen?

[Phenajo]

3 of our Peking Bamtams hatched 2 chicks together from a small clutch around 12 days ago. They are all first time mamas and were given 12 fertile eggs whilst broody. Yesterday, we introduced 4 chicks, same breed and age, carefully overnight and all 3 mama’s accepted them straight away and settled down with all 6 chicks in total. Today, about half way through the day, one of the mamas turned on a couple of the new ones, she went for one in particular. I’ve separated her, and the other 2 mamas are continuing to raise all 6, they seem very protective of them all. When might I be able to reintroduce the mamas who turned on the new ones, and does anyone have any tips for how to deal with situations like this?

 

[DobieLover]

When might I be able to reintroduce the mamas who turned on the new ones, and does anyone have any tips for how to deal with situations like this?

I wouldn't. I would put her in a broody breaker and break her broodiness. Let the other two hens raise the chicks.