One of my Buff Orpingtons is broody often. I decided to let her have a few days worth of eggs and try to raise some babies I had good intentions. I marked the eggs with a pencil. Well my 10 year old did while I held Pumpkin (the mama). She did not mark them very well. When I collected eggs after that I would check under Pumpkin to make sure no extra eggs were laid in that nest while she was eating. It is the favorite nest box. I carefully checked every day. Then I got busy with sick kids and school events so I did not check for a few days. I had never found an extra in there so I thought it was ok. I checked today while I freshened up the pine chips in the nest boxes and there are 7 extra eggs I have no idea when they were laid. The first batch she started sitting on was April 2. Today is day 16. The new eggs are from sometime in the last 6 days. When the first set hatches will abandon the other eggs? If she has too many under her will they all be warm enough? Earlier today before I realized she had too many eggs I saw two that were not under her all the way and were cool. She started with 11 eggs, now she has 18. Is that too many for one mama to sit on?