Thanks! As things get closer I'll start looking for someone local who has day olds. TSC only sells in batches of 6 and I don't want (or need!) that many babies.I think it all depends on what happens with your egg number one. If all her current eggs quit / don’t develop, then it is still not too late to buy her new eggs to replace the old. Pyxis’ broody hatching article says she normally lets first time broodies sit on fake eggs for a week before they get real eggs, and it never causes them to give up early. My Bubbles sat for almost 10 days before I could get her fertile eggs. No problems.
If 1 or more of your eggs remain viable, then adding more eggs will be a bad idea. They will be behind the others in development, and once babies start hatching mom will abandon the nest (even if there are still viable eggs in it). Babies (not eggs) will be her priority.
If you are worried about her only having one chick, but want to let her keep her current viable egg(s), you might consider buying her a few day old chicks. You could slip them under her at night after her egg(s) finish hatching.
They could just be SUPER unlucky.. The place I got 8 of my chicks from last year explicitly told me they ONLY get girls.. Steve, my buff orp was a boy. The hatchery has a 10% acceptable misgender rate. I bought ONE buff orp and it was a boy. Who knows how many other boys were in the tub. Odin and Willie came from a straight run bin so I knew what I was getting into there (crossed fingers). Also, the TSC near me says they don't order chicks, they just show up. They don't know what's coming or when it'll get there. They get a call from the post office that there's chicks to pick up. It might not be the same for all stores though. It could also be a case of them having getting a box and thinking 'these are all the same so we can put them together'.. so it *could* have originally been sexed pullets, then they got a delivery of straight run and just tossed them in not knowing what it meant... b/c clearly these people don't know what they're doing much of the time. Or at all.Gah, People just don't want to believe that their precious ISA Browns are red sex links.
ETA: People are arguing that they aren't the same thing on someone's "are these roosters" page. This poor lady picked up 4 ISA Browns at TSC. Turns out they were from a picked over straight run and she has 3 cockerels. I thought most TSC stores ordered only female layers.

