When during the incubation period does a chick start to use it's lungs for breathing?
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When during the incubation period does a chick start to use it's lungs for breathing?
At the time of pipping the shell.
8 years ago via Forums | Front Porch Forum
thank you, that is what I though but could not post as I lost INTERNET for 2 days.
8 years ago via Forums | Front Porch Forum