Developed in 1996, the Golden 300 Hybrid lays more and larger eggs, has higher fertility, and is calmer than the Khaki Campbell. Females lay approximately 200-290 large white eggs a year. Fully grown, they weigh five to six pounds. The Golden 300 can be sexed at any age by its color, as the males are shades of black and the females are shades of brown. Unfortunately, they do not retain this characteristic in future generations. Suppose you mate a Golden 300 Hybrid with another Golden 300 Hybrid. In that case, their ducklings will hatch in blacks, yellows, and browns, with no relationship between sex and color. As adults, the females range in color from a very light brown to a very dark brown, often with white areas. Males can appear much like a Rouen, or a dull looking Cayuga or white and dark markings.