I really don't know what to tell you. You've stated that the chicks that have hatched hatched cleanly and prospered. If the conditions were good for those chicks to hatch then the conditions were good for the ones that did not hatch, too. That kind of rules out anything to do with the actual incubation/hatching environment.
The first hatch... being as these were shipped eggs and the incubator was opened excessively during lockdown but you still ended up with a rough 33% hatch rate (including any possible infertile eggs). Not too bad considering everything.
The second hatch you started 46 eggs and half (23?) made it to lockdown. You ended up hatching 15 chicks. That's not *real* good, but we're not sure of how many infertile eggs there might have been in the batch. Normally it's stated that a 50% hatch of shipped eggs is a good hatch. For a newbie I would think that your hatch wasn't too terribly bad, either.
The third hatch is a little weak being as it's a 50% hatch on picked-up local eggs (no shipping). Not great, not devastating.
The first thing that I would try would be opening all of the vents to let in all the oxygen that I could during lockdown (might have to jack the humidity up a bit)...the requirement for oxygen is at it peak during hatching.
Make sure they're not sitting beside a gas hotwater heater or something like that. No noxious sprays (hairsprays, air fresheners, disinfectants, etc.) sprayed close by.
I just think you need to get back in the saddle and try it again...maybe you're getting your bad hatches out of the way.
Ed
The first hatch... being as these were shipped eggs and the incubator was opened excessively during lockdown but you still ended up with a rough 33% hatch rate (including any possible infertile eggs). Not too bad considering everything.
The second hatch you started 46 eggs and half (23?) made it to lockdown. You ended up hatching 15 chicks. That's not *real* good, but we're not sure of how many infertile eggs there might have been in the batch. Normally it's stated that a 50% hatch of shipped eggs is a good hatch. For a newbie I would think that your hatch wasn't too terribly bad, either.
The third hatch is a little weak being as it's a 50% hatch on picked-up local eggs (no shipping). Not great, not devastating.
The first thing that I would try would be opening all of the vents to let in all the oxygen that I could during lockdown (might have to jack the humidity up a bit)...the requirement for oxygen is at it peak during hatching.
Make sure they're not sitting beside a gas hotwater heater or something like that. No noxious sprays (hairsprays, air fresheners, disinfectants, etc.) sprayed close by.
I just think you need to get back in the saddle and try it again...maybe you're getting your bad hatches out of the way.
Ed
