I have three or four bantams of differing breeds that are laying. My daughter really wanted to see if one of them would get broody. I numbered the eggs on the 18th so I could continue to collect new eggs. Our little Black rosecomb was sitting on the eggs yesterday afternoon, but went out when I let the flock out to range. This morning she was on the eggs again. When I got home, the frizzle Cochin was on the nest. She eventually left it and later the rosecomb went back in the box. There was an extra egg in the nest, but there were two on the ground also. I wonder if she wouldn't leave the others alone until they left "her" nest. Rose also was sitting in the box when I closed the coop at dusk. She looked settled for the night. She isn't puffing up and growling though, and she got out of the nest when I came close. Does all of this means that she is on her way to being broody? Does it usually take days to become full on broody? Decades ago, it seemed that they were broody over night, but of course I was much younger then and probably didn't watch so closely.