Update: Well I ended up getting 4 Java chicks and 7 BLRW chicks to put under her the evening of 5/6. The next morning, when she got up she only had 3 unhatched eggs under her and no new chicks. We knew that eggs were disappearing since we were pretty sure we had put ("we" being my husband who said that he put about 12 or more under her.......see story below(*) around 12-13 but assumed they were bad and were breaking and getting absorbed into the straw nest). Anyway, we took the remaining 3 eggs from the nest the next morning and none were viable. Around noon on 5/8, when I went to check on the chicks one was missing AND in addition I found a 6' king snake in the pen. Mystery solved! I grabbed up the chicks and Mom and moved her to a safer spot and the snake was relocated to a remote location. (No pictures as I was just too freaked out to think about the camera, although now I wish I had).
This is my 2nd shot at having a broody and while my hatch rate has been really poor, each time I learn more and more. In both cases the Mom's have done a great job raising the surrogate chicks. (We did lose one this morning for some reason so she currently has 5 of the 7 BLRWs and all 4 Javas.)
(*) Life at Spring Lake Farm - Conversation between myself and husband (HB)....stands for Hillbilly as he is from WV:
HB (during the middle of the day): Well, honey, I moved the BLRW to the brooding pen.
Me: I thought we were going to do that tonight so that she would be more likely to stay settled in the new place.
HB: Well I went ahead and moved her.
Me: OK......so then tonight, if she seems settled, we can put the eggs under her.
HB: Nope, already did that.....
Me: Oh, how many eggs?
HB: A lot.
Me: "A lot" like 7-8 or "a lot" like 20 or so.
HB: More like 12 or more.....
Me: Awesome.....well thanks for your help, hon.....
HB: No problem.