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Incubation Duration

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Guest:
Can someone verify that 21 days for incubation for chicks equates to 21 full 24 hour periods (set at 10 a.m on Saturday then they start hatching at 10 a.m on Saturday 3 weeks from then)?  This is my understanding of 21 days (504 hours of incubation time).

Or is it 21 calendar days (i.e. set on a Saturday and they start hatching on the Friday preceeding that third Saturday)?

I have been a lot more diligent in my record keeping this year and only set eggs each Saturday morning of the week\'s collected eggs.  My settings have all started pipping the day before (on the 20th day in my understanding).

I run my incubators with a pair of digital thermometers in each one and they alternate between 99 and 100 degrees at varying times for each one (so my conclusion is that it is running at 99.5 average).

Do I just have the oven too hot?

bantamhill:
I personally run my incubator a little hot because I think a quicker delveloping chick is stronger than a slow one. I have many eggs hatch on day 20 (especially bantams). I would simply set them a day latter if you are wanting them to hatch on a specific day. If you set on Saturday at 10am . . . the end of the 21st day is Friday at 10am.

Michael

Guest:

--- Quote from: bantamhill --- If you set on Saturday at 10am . . . the end of the 21st day is Friday at 10am.

Michael
--- End quote ---


I must be reading the calendar wrong.  Starting with the time of setting (for example, Sat. at 10 am), the 24 hour period from then to the next day constitutes 1 day.  So, on Sunday the next day at 10 am is 1 day, 10 am on Monday is 2 days, and so on until the third Friday at 10 am makes my count 20 days.

Guest:
I\'m on my first incubation now with the machine holding 99.5 rock solid. I put my eggs in 3/2 at 10 PM, so I\'m projecting 3/23 at 10 PM as the hatch time. That\'s 21 days. I\'m using the 24 hour method, but that\'s as a guide.

I\'ll post here if any birds hatch sooner than that, which I understand may be up to 24 full hours.

jwoodhaven:
Most of our bantams are hatched at day 20 and the large fowl are hatched by the end of the day on the 21 day. We keep our temps at 100 to 101 and find that we have a better hatch with the slightly higher temp. We also have the humidity at 60 to 65% durning incubation and 70-75% durning hatching.

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