Ventilation (oxygen)
Ventilation is very important
during process.
While the embryo is in
development, oxygen enters the egg through the shell. There is ventilation holes
on both above the egg and below the egg.
Humidity
The average chicken has
thousands of pores running through the shell allowing the embryo to exchange
oxygen, carbon dioxide and waters. Soon after the egg is laid, a small air bubble
or “air cell” forms in the big end of the egg. The chick can drown if the air
cell is to small.
Every night we have to check
the trays at the bottom of the egg to make sure they have warm water in them to
keep the humidity right for the eggs.
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