At PARROTCARE we have a dozen or more mercury thermometers. By trial and error we have established a control thermometer, from which all other thermometers are calibrated. Even the most accurate and expensive mercury thermometers can be out by up to about ½ ° which can cause the eventual failure of the egg during incubation. I have modified the incubators at PARROTCARE to ensure that the thermometer is directly above any egg being incubated.
Maybe we're old fashioned, but we do not trust digital thermometers for this task. Whenever in the incubation room the first job is to check temperatures in both incubators and hatchers for accuracy. Any changes from the norm are registered and rectified. A temperature of say 38°C, i.e. ½° higher than is recommended, will not kill the embryo immediately, but eventually weaken the embryo where it will fail to hatch or die. A lower temperature can be rectified provided it is noticed within 2 days of the problem occurring.
Changes in temperature during the first part of incubation are often more critical than in the latter stages. It is therefore recommended to leave any eggs with the parents for at least 21 days if possible.
In the early stages of incubating eggs at PARROTCARE we used to routinely sterilise all eggs. I have ceased to do this in the past 10 years as on one occasion I am sure that the embryos were destroyed by the disinfectant. Once an egg is disinfected, it has no resistance to the entry of bacteria or fungus. I would not recommend the disinfection of parrot's eggs and prefer to leave them with the natural resistance which has been built in by the hen.
THE TEXT ABOVE IS
FROM "PARROT INCUBATION PROCEDURE AND HAND FEEDING" A PARROTCARE PUBLICATION
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