Originally Posted by Arielle
I have noticed that dry shells are very brittle. Once I noticed this I wondered why the chicken eggs need a 50-60% RH to hatch. The hen doesn't change humidity, so why do we alter the incubators.
Sorry, I have a math head, that sees the world in patterns and corelations.
the shells become more brittle as the chick grows because it is absorbing calcium from the shells in order to grow it's bones.. as the shells lose the calcium they become more brittle
yeah.. the hen doesn't increase the humidity at hatch.. but she is also incubating naturally...
lately (for chickens) I have been dry hatching in the Reptipro (not adding any moisture at hatch to see how the chicks fair).. they are hatching just fine since as soon as the first one pips the shell the humidity rises on it's own... just like it would under a hen (they are also being dry incubated).. I haven't lost a single egg that was growing an embryo.. I have also opened the door a lot to LOWER the humidity since I still have eggs incubating in the same bator
Now I couldn't attempt that in the Brinseas because of the location of the fans.. they HAVE to have more humidity to counteract that darn fan.. (and broody hens don't have fans on their bellies).. besides.. i refuse to try to HATCH anything anymore in the Brinseas since the Reptipro is doing an amazing job...
I will still raise the humidity for my goose and muscovy eggs when they move to teh Brinsea for hatch since this is something new I have been trying... and I don't want to play around with the goose and muscovy eggs since they were shipped and I paid for them
I do have a lone turkey eggs that my husband added because it was pure white.. so I will experiment with it and see how it does at hatch .. normally i would raise the humidity up to 80% for turkeys at hatch.. but I'll risk this one and see how it fares