Hens driving me Nuts

Sooo,

My Rosi (Brahma) loves chicks. And because of this she tried everything to steal away the Chicks of the other Hen who went broody first and hatched three Babies.

She wasn't interested in brooding herself and I thought : "Get her some day old chickens."

Last year, this worked perfectly fine and she raised 8 happy Chickens.

So I got four Brahma chicks and Rosi hated them. Pecked on them till they screamed (removed them immediately) and waddle off to try to steal again from the other Hen (Chicks and hen are separated, Rosi has no chance to get them).

She still tries like 3-4 times a Day.

So now I have four chicks in a Rabbitcage in my Bathroom, an Angry mother Hen who would like to kill Rosi (maybe I thought about joining her for a second) and Rosi, who is still mad at everyone for not getting the Chicks she wants.