HI! I have a black Australorp who is 8 months old, she has been laying almost everyday for close to 2 months now. She is top pecking order. I have 4 birds total, all laying almost daily. The last couple days, she has been in the nest all day and all night last night. So today, I pulled her out and she had been sitting on my leghorn egg. I checked her out, looks like she plucked her chest feathers. No egg from her for 3 days. She is all puffed out and very vocal, laying on the ground. I threw scratch out for everyone and she keeps puffing up when I come close. Advice? Is this broodiness?