Just candled again - my "suspect" early quitters were indeed early quitters. Both eggs were fairly porous too. I didn't candle before setting -but I can see why that may be a good idea.
Several of my traded eggs are incredibly dark with candling. I think its a combination of thick shells and good development!
Now to troubleshoot our brooder problems! We have an outdoor insulated brooder that we have a light and turn-off valve set to the thermometer to prevent it from getting too warm (it gets very hot in the summer). However, it has not been holding heat well with the winter. My husband added a second bulb which seems to help it retain heat. The bulbs had been shutting off automatically, so he picked up a plug-in lamp to keep the brooder from getting too dark -
However, this morning I went to open up the brooder (we have 4 thanksgiving chicks inside) and it was 102 degrees! The lights didn't shut off :-( The chicks were okay - but breathing like they had heat stress. Hoping we can fix this before the new chicks arrive!
What I've done to keep the heat in was wrap the cardboard box in shipping blankets. I also run a light non stop for a couple weeks while they feather. The box stays cool except at the plate and light. Beings this is winter and colder outside I might put another light in depending on amount hatched. I also put insulation under the box to help keep warm. The combo of warm area and cooler areas seems to keep them happy. Oh and I also check late at night to make sure they are staying warm. I have hatched in January before and it seems to work for me. Our temps only get down to 28* at night here so this may not work else where.
Does your brooder have a cooler area they can get to if necessary?