I had a similar situation just now. Long story short my broody rejected 2 eggs yesterday and I put then under another broody. Today they hatched but did at make it out. I'm not sure what happened but they were still quite encased in shell and looked a bit flattened. I thought I heard peeping earlier but when we returned to check on the progress the peeping had stopped

. This was this hen's first try and ours too. There are 3 eggs under the other broody and I noticed a black little fuzzy face as I attempted to look under her but don't know if the other 2 are/will hatch. I guess I should let nature take its course. These 5 eggs were "grown" in an incubator until day 18. Not sure if moving them to hatch under hens at that point was the best plan either.