The ratio of the amount of a nutrient retained in the organism or in a product formed by the animal to the amount of that nutrient ingested.
Paired bare skin structures below the ear of chickens, slanting down toward the ...
Ability for faster growth and earlier completion of body development compared to...
Ability to start egg laying as early as possible while meeting requirements for ...
An animal’s propensity to consume feed—intensity and amount—affected by appetite...
Products of the reproductive organs of female birds; differ by species in weight...
A mechanical device used in egg‑breaking plants for automatically separating the...