Brush-like feathers arising on the last caudal vertebrae near the uropygial gland orifice; used to apply the gland’s oily secretion.
Individuals of the dam and sire lines with tested performance and combining abil...
A unit equal to one billionth (10⁻⁹) of the whole.
A unit equal to one millionth of the whole (0.0001%).
The highest egg production achieved by a hen or flock during the laying period.
Hatcher tray or box with partitions/holes that prevents uncontrolled movement of...
A meat-type duck breed originating from China and refined in England; characteri...