Areas of the bird’s body surface without contour feathers; in chickens, for example: cervical, abdominal, sternal, lateral, alar and axillary apteria.
Parts of carcasses not used as food and processed in rendering plants.
Feathered duplication of skin in waterfowl at the caudal part of the ventral bod...
Eggs with deformed shape or strongly deviating shape index values.
Defect of plumage in which feathers fail to grow on certain body areas, or the e...
The process by which animals adapt to a changed environment.
A value determined by titration of fat dissolved in an ethanol–diethyl ether mix...