aart, last year late summer I had to birds decide to go broody at the same time. Our egg production started to drop off or so we thought. We didnt pay much attention to these two girls at first and just thought they were doing their daily routine of laying eggs in their favorite boxes. Becoming suspictious after the third day, I decided to gather the eggs under both of them. 12 under one and 15 under the other! They both had been stealing eggs from the other girls and gathering them underneath themselves. I took the eggs away and locked the whole flock out of the coop for the day in hopes to break them from broodiness but the next day they were right back in there again. Soooo, every morning for the next 21 days we had to change our routine and gather eggs before they had a chance to steal them for hatching. We candeled and marked some freshly fertilized eggs and let them sit on them for the duration. For whatever reason, only one chick emerged from both hens. She was a beautiful little thing to behold! After 3 days I took her away from her mother and put her in a brooding box until old enough to join the other hens. Its quite an experience and quite natural. Dont be alarmed. Enjoy!