Day 23 only four hatched out of thirty
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Bantam eggs tend to take less time so I would expect Jersey's to take longer, bu that's a few late late there... In the other eggs, do you hear anything, feel anything, do the already hatched chicks seem fine? Did they hatch normally?
Not sure if this would apply, but I read that high rates of deaths between days 10-15 can indicate bad breeder flock diet. Of course a temperature spike could definitely have been a problem.
Edited by beetandsteet - 2/2/16 at 11:05am