I have 5 hens that are about 25 weeks old. 3 Brahmas and 2 Cochins. All are laying except one Cochin who is getting bullied by one of my Brahmas. What should I do? I feel bad for her because she is constantly being chased after and pecked on her head. The bully is even biting her wings. Should I separate them? For how long? Will it work or should I just start looking for a new home for the bully?