Mine are 10 months old & one went broody on Wednesday. She only gets off the nest first thing in the morning to eat & drink & poop, then she is back on her nest of 3 eggs. A BR & Light Brahma both tried sitting on her in the same nest box to lay an egg, she never moved (the BO), and I had the hardest time trying to get the Light Brahma out of the nest box, she is so big.