angieangie
In the Brooder
- Mar 2, 2017
- 32
- 5
- 14
Yes I am also running it at a slightly lower temp. Nothing drastic, just a half degree or one lower. It's been running at 99-100, when I should be running it at 100-101, since it's still air. I have a few quitters so far, and one that didn't develop at all. I can't tell with my brown eggs anymore, so some might be quitters, but it's hard to see whats going on in there. I will let you all know my ratio, on friday they go into lockdown. And yes you are right, there is no way to change the actual sex.I think this stems from a university study from a few years ago. They determined that slightly lower incubation temps favor females, and slightly higher temps favored males. But this was a very slight difference, I think maybe 1/2-1 degree? And this only very slightly shifted hatch rates in favor of one over the other. There is no way to change the sex of an egg after fertilization. I have had hatches in January from very cold eggs run at 80% male, and vice versa. I actually run my Brinsea at a slightly higher temp (100.4), because I find I have better hatch rates that way, and it seems to have no effect on sex ratio.
There is one theory I do subscribe to regarding sex rates. There was a study that showed that early eggs in a hen's life are more likely to hatch male, and I really think I've seen evidence of this with my hatches. My young hens usually start laying their first eggs right after the new year. I always end up with more males out of those early hatches, as well as from younger hens, than I do from older hens or late spring/summer hatches. So I try to avoid setting eggs from my hens until they've been laying for a few months.
As far as power outages and turned off incubators, hatching eggs are surprisingly resilient. It takes quite a while for the interior temp to drop dramatically. Broody hens leave their eggs unattended for an hour in very cold weather. Once, I had some unhatched eggs on day 23 of an incubation that I assumed was finished. I candled the remainders, saw no evidence of life, and sat them on the counter to be disposed of later. 8 hours later, I heard chirping from one of the eggs! It had internally pipped! I quickly returned it to the incubator, and it hatched a perfectly healthy chick. I couldn't believe it! That chick was like a miracle.![]()