Recently I began selecting eggs from certain layers that likely had been getting busy with my rooster (haha) and putting them under my extremely broody hen, Henrietta. I have all brown layers (except for one blue but she's not currently laying). I candled 3 eggs yesterday from 1/16 and 1/17. Being completely new to this, I believed one eggs wasn't fertilized, one was rotten, and the one from 1/17 I was unsure about. So I put 1/17 back under Henrietta, and broke open the two from 1/16. I was right on the unfertilized one, but was devastated to see that I was wrong on the "rotten" one as it was a viable embryo. I felt terrible. But such is the luck of a first-time candler.
Today, I went back out to check on Henrietta and select any new eggs, and saw that she has pushed 1/17 out of the box. I have read enough to know this is usually not a good sign. So I brought back in 1/17 to check it out, and it looks like it's fertilized and not rotten.
I put it back under her. What could be the reason for her pushing it out, and was it the right thing to do to put it back under her? The last thing I want to do is kill another embryo - this bothered me so much I dreamt about it last night. :( But I also don't want a rotten egg exploding all over the other eggs under her (there are currently 4 others).
Thanks for your expertise! And if anyone has advice on candling brown eggs, that'd be great too. Because a lot of the pics/videos I've found are for white eggs.