I wouldn't just throw them out based on age - in my last hatch (just hatched April 23/24th) I put 18 eggs in the incubator that I had kept at room temp (70) for 20 days. 16 of them were fertile. I had a problem with the humidity (it was my first ever actual incubator hatch) and I didn't take into account the normal room humidity. Unfortunately I learned the hard way - because six of my beautifully formed chicks drowned after pipping internally. I managed to save one from drowning and dried it off really good - even had to dry its mouth out - however it is having some problems and I really don't know what to do - it's been 30 hours out of the incubator and still can't walk. Simple fact is that if the humidity levels had been correct I would have had a 100% hatch rate (of the fertile eggs) on 20 day old eggs. I have set a new batch (last night) of 26 eggs. This time I am doing dry incubation because the normal humidity level where I live ranges between 50-70% on most days and rarely ever drops below 30%.
Here's the one that hatched from the 20 day old eggs. 3 Brahmas, 2 Blue Splash Ameracauna's, 1 Brahma/Dominique Cross, and 4 EE's.
