Contagious viral disease manifested clinically by paralysis, changes in pupil shape, skin lesions, and tumors on internal organs; flocks are protected by vaccination.
The amount of nutrients required to keep an animal in nutrient balance.
System whose function is production of semen and its introduction into the femal...
A symmetrically rounded prominence of the cloacal mucosa located between two dis...
Embryo positions before hatching that differ from the normal longitudinal positi...
Shell layer adjoining the outer shell membranes, formed by conical structures; f...
Number of hens per one male in a breeding flock.