Embryo positions before hatching that differ from the normal longitudinal position, e.g., transverse, head between legs, head toward the small end, head turned left, head above the wing, or legs above the head.
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...
Shell layer adjoining the outer shell membranes, formed by conical structures; f...
Contagious viral disease manifested clinically by paralysis, changes in pupil sh...
Number of hens per one male in a breeding flock.