I'm no pro . . . so hopefully other more experienced people will answer.
[On our family dairy farm we had tons of chickens, all bought as chic's ~ never incubated a single one.]
But per
reading . . . humidity after day # 18 should increase to 70%.
[Page 62]
Lower humidity allows the membrane to dry, especially once the chic pip's through the shell. A dry membrane is a death sentence.
I read somewhere else that 95% humidity was good after day 18 - and a fogged incubator window would be a good sign
[though fogging would depend in part on the temp/humidity out side the window.]
What 'lockdown' humidity levels have the rest of you used with success ?
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Getting humidity elevated can be tricky . . . here are some tips I've read about:
- Keep the incubator in a closet with a humidifier.
- Put sponges in the water pan in the bottom of the incubator - they help wic the water into the air faster.
I did see a cautionary note, not to close the incubator vent holes in an effort to increase humidity as that would increase carbon dioxide.
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In any case, I'd be very happy to be as successful as you were. That's not a bad hatch rate at all.
My kids and I will be trying this ourselves once it gets a little warmer . . . toward this spring.
Warm Regards,
Xriva