When hatching duck eggs, there are several factors that must be meticulously studied and kept accurate such as heat, humidity and turning. Heat and humidity are common knowledge, since most know that ducks are hatched after a mother duck keeps them warm and moist by sitting on them. Less widely realized is that, in nature, eggs are turned several times a day by the movement of the mother and that this is an evolutionary tactic for the egg's survival.
Turning the egg prevents the embryo from adhering to the side of the shell, which often causes the egg to fail. More.
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