One of my (tame) Silkies has gone broody (on the floor of the coop). I wasn't ready so she is sitting a clutch of mixed eggs (3 silkie, 6 full size mixed breed eggs). I tried to move her out of the coop and separate from the flock and she threw a fit. Instead I grabbed a cardboard box and made her comfy. I have a flock of 18 (3 roosters and 15 hens) and this is my first clutch. At what point do I really need to move her? The books say give her whole wheat and grit. Is this true? What advice would you give to make this go as smoothly as possible? Thanks much!