Trish44, the sad truth is I candled on day 10 and couldn't tell.

I realized what had happened when the first batch did not hatch and that was only days away from the second batch going into lockdown. I thought maybe my temp had been low or something.

My shells were so thick I couldn't see much of anything. What I did see was apparently the yolk and it's not like I haven't done this before. Heavy sigh. I'm going to have to use 3 or 4 lights to see through those thick shells. Evidently my girls have been hitting the oyster shell hot and heavy.
Danz, you're right it may have been the cold temps also. Anywho, we've been putting in raised beds and for once DH got interested in "helping us" because we were going to use those bricks that have been sitting around forever and when he saw all the work we'd done, he declared he was planning to use the bricks for his walkway to the shop. Whereupon I thought to myself "What year?" So we had to take all of those bricks and put them back, wait on him to build the beds out of all the boards he has lying about. I am not allowed to use the saw myself because "he would never forgive himself if I got hurt". Okay, but I'm not planning to manicure my nails with it, I just want to cut some boards!

Anyway, then we had to change the size of the beds because they were now going to be 4' wide instead of 5' wide which meant lots of manual digging because you know how long those beds are. Okay, enough grousing. The upside is that he is really into helping now and is plotting out the watering system, so all the schlepping of bricks turned out to be worth the effort because he is putting together a drip irrigation system for us so we don't have to attempt to keep up with the hoses!
That's pretty much why I haven't attended to my email, so tired and sore and occupied with a houseful of teens and a couple tweens still mad at their sister, then new chicks came, etc., etc. Sorry, girl!
Tatinatimom, that's how chicken math works around here too!

I had 51 chicks in my bators, one hatched, so I bought 56!