Poultry > General
Eggs are laid and exit the vagina via the vent which is on the outside of the bird. The feces with uric acid enter the cloaca (sewer) then expells it outside. When the hen lays an egg she everts the cloaca to seal off or close the cloaca before laying so no contamination of the egg occurs.
Ken Koelkebeck Extension Specialist, Poultry
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