![]() ![]() ![]() Here's what I do- I am not a professional hatchery, but I have hatched thousands of different speices using either a humble sweet broody hen who has hatched for me before, or my little forced air Hovabator. The only factor I can think of for the maladjustment is the difference in temperature that 6 closed top vent holes make versus open top vents. The next morning, to my horror, the temperature read nearly 106 degrees! While I immediately cooled the eggs down, it has take quite a bit of time to gradually readjust the temperature to 99.5. As it takes a considerable amount of time to return the incubator to original temperature with that many geese eggs in it, it still was below setting at bed time. ![]() Is it possible that for older incubators, such as the classic Brower metal "goose egg incubator" -as the old time setters refer to it, because of it's size and depth- that the temperature must be regulated after closing the vent holes, even before putting the eggs in it, as opposed to regulating, putting the eggs in, and then putting coins -or such- over the vent holes? I ask because I regulated my Brower to 99.5, put 18 Sebastopol & 8 Buff geese eggs into the incubator mid evening, then first covered the vent holes. And as I described above, don't be afraid of cooling them too much as temperatures below ideal will not be a problem.ĭear John, The recommendations within for single stage incubation are to close all vents at the start of incubation. Therefore, you want to cool the shell lower than the ideal temperature. Remember that as you cool the eggs, the shell will cool faster than the interior - but it is the embryo in the interior that must be cooled. Blow air over the eggs to more quickly cool them. If you have just a few eggs, dunk each egg in cool, not cold, water. If you have lots of eggs, spray with a garden sprayer or hose. What To Do When You Discover Your Hot Incubator When it was discovered, we cooled the eggs as described below and the resulting hatch was completely normal. Just recently we had a machine that was supposed to be 98.7 gradually increase to 104 degrees over 3.5 hours. An interior temperature of 103 almost guarantees death. But on another occasion, I had no losses when the incubator was 102 for four hours. Years ago I lost all the eggs in an incubator when it was 105 degrees for six hours. There are no black and white limits with overheating. And if it is an older embryo, it is generating heat and this makes overheating even quicker. But sustained higher temperatures allow the entire interior of the egg to become hot and that is when injury and death occurs. Hot temperatures for brief periods usually cause no problem. Injury or death depends on how hot it gets and how long it is hot. High temperatures in an incubator are an entirely different matter. It probably will not adversely affect your hatch. So if for some reason your incubator has a problem and cools down for a period of time, don't worry. These eggs were old enough that they were putting off more heat than they required, so development was slowed but not stopped. ![]()
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