hatching problems...

Mark1985

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hello, new on here, but not new to quail/birds at all. but having problems hatching eggs.

a number of years ago, i got 2 covatuto6 incubators for my xmas, and the first egg i used in them were chinese painted quail, i used 8 eggs from the pair i had at the time, and although all the eggs were fertile, and all pipped only a single chick managed to hatch and it was very weak and wobbly, and died a week later. i was given the advice that the humidity was too high and that i shouldnt have had water in the incubator at all until the last couple of days of incubation (i had the wells full of water from the start). so the next eggs to go in were bobwhite eggs, and i didnt fill the wells untill the last 2 days of incubation and lo and behold i had 100% of fertile eggs hatch. after several batches of bobwhite, i tried a couple of loads of japanese as i had plenty of them laying at the time. using the same routein as i did with the bobwhites, i got to hatch day, and only one or two eggs would pip and hatch. i left the eggs for almost a week after the hatch date and gave up and broke the eggs open to see what was going on to find that all the fertile eggs were fuly developed, and in most cases still alive but had not pipped or had not absorbed their yolk sacks, and would die withing minutes of the eggs being opened. some of the chicks were only about half developed, but again still alive, evn though the eggs had been in for in some cased 25 days. one last batch of bobwhite, perfect hatch!?!
i had to give up quail some years ago and recently dug out my old incubators, cleaned them up and got come chinese painted eggs. they were due to hatch 29/3. .... of 30 eggs, 3 hatched on time. i left the remaining eggs well alone until today. 5 infertile, 20 were full developed but had died before even pipping, and i found one that had started to hatch but got stuck, he is still alive and is still in the incubator recovering as he all crooked at the moment from being trapped in his eggshell.
can anyone tell me where i am going wrong with jap/CPQ?? should i just not add water at all?
 
I can only speak from my limited experience of two batches of coturnix hatched this Spring in a Brinsea Mini advance, which takes 12 quail eggs. Following advice from experienced people, I incubated dry, indoors, until Day 16 when turning stopped and at that point I filled the water pots. Humidity in the air of the bedroom was about 55% throughout. All the fertile eggs in both batches hatched on time with no problems, all healthy strong chicks. I'm sure you are right to incubate dry in the early stages, and the numbers of fully-formed chicks would suggest that they were developing well up to a point. Did you check temperatures with another thermometer in the inci? If it was running a bit cold maybe that would influence the late development of some of the apparently fully-formed chicks. You do know the inci has worked well in the past with your bobwhites, but maybe something has gone amiss whilst it was in storage? It must be very disappointing for you to have such poor results with all the experience you have to offer.
 
thank you for your reply.

it seems bizzare that my first hatches with chinese quail failed, but that apeared t be due to humidity. then bobwhites did great, then the japs failed repeatedly, then more bobwhites did well, now 20 perfectly good chinese eggs failed. my only theory is that opening the incubator to fill the water wells gave them a chill and the sudden increase in humidity prevented them heating up again... who knows... il have to get some more and try again, but tweek the routien a little.
 
It might be possible that the eggs would chill if you opened the inci for a long time, or kept on opening it and taking them out to candle them, but I don't suppose you did either of those things. Maybe tiny quail eggs are more prone to speedy cooling than larger ones, especially CPQs? The increase in humidity shouldn't have lowered the temperature because the water wouldn't start to evaporate unless the temperature was high enough anyway, although adding a lot of cold water might possibly lower it a bit. I was told by an experienced breeder not to add water until I could see pipping, but as they tended to hatch overnight I just added it when I removed the turning circle and inserted the non-slip matting in the base when turning ceased on Day 16. Maybe the water should be warm, ie at the same temperature or higher than the inci? Then the heating element wouldn't have to warm it up, thus possibly causing a drop in temperature. Although I didn't warm the water for my hatches I still think it might be a good idea for next time. Do you feel it's likely to be a temperature thing, rather than a humidity problem? Something seems to be happening in the later stages, doesn't it - chicks develop well under the dry incubation early on, then fail to hatch at the proper time. If they were still alive at 25 days, a whole week too late, maybe they were developing too slowly because of low temperatures? You didn't say whether you had checked the inci temperature against another accurate thermometer - could this be a good idea next time (or before you put the eggs in, once the inci has had a day or two to get up to temperature and settle down.)

Strange that your Japs failed repeatedly - I thought they were usually pretty easy to hatch. I wonder what it is about bobwhites that suits whatever you are doing with your inci, that CPQs and Japs don't like? Could they be more resistant to low temperature, if this is the problem?
 
i dont have a thermometer for the incubators, il try and ge ahold of a little digital one to see if this is a problem. its slightly dissapointing in any event, but il jus have to try again, and if it dont work, stick to bobwhites lol
 
I'd recommend getting a proper incubator thermometer because it would be worth the outlay to get to the root of the problem and avoid the waste of time and frustratioin of failed hatches. Then test out the inci for several days before trying any eggs in it. What temperature were you setting it to, anyway?
 
Are you sure about that, Mark? Have you still got the instructions? I think most incubators can be adjusted because some species need different temperatures and also it enables you to compensate for inaccuracies which may develop in time in the machine. I hatched mine at 37.8C, according to the instructions for quail with the inci, but it could have been changed higher or lower. 37.5 sounds a bit low to me, I don't know what other people would recommend. If it's actually not reaching 37.5 anyway, it would account for the late development problems. Maybe a new thermometer will cast more light on the actual temperature.
 
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