My sympathies. That really stinks! Perhaps you'll be able to find some more blrw eggs.I just went in and found the last two blrw chicks dead They were both doing fine last night, and even this morning they were looking good. I left for a few hours and when I came back, one was gone and the other was taking its last breaths.
Hatches here have been OK - but not good. (Normally I get well above 80% but this year only 50-75% are hatching.) Part is due to switching up the flock. I added new blood last summer, and although the beautiful new girls are laying, the young handsome roos are not doing their part. They're 10-11 months now, so hopefully they'll get some technique soon.
To make up for the lower fertility, I've been adding more eggs. Chick numbers are higher than normal!!!
....... but that may not have been my best idea. It's A LOT of work. If DH actually counted, I may end up sleeping in the coop with the chickens. LOL