Well, if you can't pull, you can trim.
Right now I go out to collect the hatching eggs with a pencil. I have some cheap-o thermometers at key points by the nest boxes in breeding coop areas. I write the temperature on each egg while I label it; thus I can keep track of what might actually have been chilled rather than be infertile. On the other hand, this was the warmest February I've ever seen in NH; so we're hatching a strong percentile.
Best of luck!
Man..........I wish I could be as organized as you are......okay, I could be, but, never thought about putting a thermometer where I could write the temps on the eggs to rule out chilling as a cause for infertility. Great tip!! Thanks!
			
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