So how does everyone do staggered hatches, if they just have one incubator? I have one set due next Saturday, one the following Friday but will be getting more eggs mid week. I dry hatch, but not sure how to balance "lock down" with the others needing their dry hatch time. Thanks!
staggered hatches need to be monitored
I do them all the time.. (I also stack eggs.. but that's an entirely different discussion)
Here are the BASICS... you may need to adjust a bit as time goes on
the main thing is there is no "lockdown" especially if you are hand turning eggs.. so depending on the incubator you are using you may have to assist a few chicks (fan placement is a killer)
anyway.. lets say you have three batches of eggs in the incubator
batch 1 went in 18 days ago
batch 2 went in 10 days ago
and batch 3 went in 5 days ago (for argument sake.. just showing a scenario)
first .. DRY INCUBATE.. do not add any water unless you are seeing that batch 1 eggs are having a difficult time retaining weight (monitor air cells or weights)
so on day 18 you notice the first chick from batch 1 hatching (pipped).. raise the humidity for the rest of batch 1 (do not "dry HATCH unless you have gotten through several dry INCUBATIONS with success and know your incubator)
as soon you are positive there are no more viable eggs left from batch 1 you will need to drop the humidity back down as low as you can get it .. so remove ALL of the water
when you see that the first egg from batch 2 has pipped.. again raise the humidity for batch 2 to hatch
Once the last viable egg (chick) has been removed from batch 2 drop the humidity back down again to as low as possible until you see the first chick from batch 3 beginning to hatch
monitoring air cells or weights is important since if the humidity has been too high for the remaining eggs and the air cells or weight loss hasn't been great enough you will need to add something to lower the humidity even more (dry white rice or silica gel packets)
It is extremely rare that you would need to add water for the remaining eggs during incubation since you will have to compensate for higher humidity during hatch for the previous eggs
when you hear that people "dry hatch" 99% of them mean DRY INCUBATE..
i have dry hatched.. the difference between the two is that for dry INCUBATION you do not add any water to the incubator DURING INCUBATION unless the air cells or weights call for it (some people insist that water needs to be added depending on hygrometer reading.. but that can be misleading if the hygrometers are off).. however water is added at hatch
for a dry HATCH.. no water is added at all during incubation OR hatch.. meaning you let the eggs naturally raise the humidity when they begin to hatch.. no other moisture is added since the moisture from the drying chicks will bump up the humidity naturally
the problem with a dry HATCH is that some incubators are just designed wrong.. meaning the fan placement is horrible and then end up drying out the hatching chicks (especially if one has a large pip).. so dry HATCHING is not for someone who has just begun to incubate eggs since you must learn how YOUR incubator acts in YOUR home during that particular season of the year and with those particular eggs.