One of my EE, Mabel, started laying eggs about 3 weeks ago. She gives me gorgeous olive green eggs, maybe 5 a week so far. On Friday, I watched my SLW lay her very first egg, and Mabel watched as well. As soon as the egg came out, Mabel zoomed into the box, putting herself under poor the SLW, who was already looking a bit shocked. SLW managed to extricate herself and get out of the box. Mabel sat there for about 2 more minutes and then got up and walked out. This morning, I went out to collect eggs and found Mabel sitting on a different chicken's egg. Again, it only lasted for about 5 minutes, and then she got up and walked out. Is this broody behavior, or is she possibly trying to claim credit for the others' eggs?