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21 Days and 7 hours -- only 3 birds hatched -- should I be worried?

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Guest:
OK.....here\'s what happened so far:

Day 20 (yesterday) at 4 PM got the first pip. By 10 (Day 21), one bird hatched and six more eggs were pipped.

This morning -- Day 21+ 7 hours -- three birds have hatched, I still see about four or five pips and nothing else. Is this normal, or am I in for a very high mortality rate?

I\'m concerned, because some of the eggs pipped more than 12 hours ago and nothing has happened with them since.

The three hatches so far are Ameraucana/RIR crosses. One pure Ameraucana egg is pipped but that\'s it.

bantamhill:
What it the incubator temperature and humidity?

Michael

John:
According to what I posted under the Incubation Duration topic they should hatch between 21 and 21.5 days and raising the temp one degree should get them to hatch 11 hours sooner.  
It sounds like you\'re on the right track or close to it.  I would increase the incubator temperature by one degree next time.
If they pip after 20 days but don\'t hatch the problem is probably not the temp, but could be a combination of several things like humidity during the hatch, sufficient oxygen during the incubation period, diet of the hens, number of days the eggs were held prior to incubation, conditions the eggs were subject to prior to incubation, etc.

Guest:
Mike,

Temp is 99.5F humidity 70%.

John...thanks....Now 11 - 13 have hatched and three of the blue (Ameraucana) eggs have significant pipping.

Breed/sex link question here: Ameraucana Silver Male + RIR female -- will that produce a sex link? All of the hatches so far are the Easter eggers. Some are yellow with just a tinge of brown or black -- others have a lot of black in them. Are the latter roosters in the making?

bantamhill:
I am located in Central Missouri and I run my incubators warm - 100 degrees in with force air.

I use no extra moisture until the last three days of incubation. I would say they are just a little slow hatching from your update.

Michael

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