The Andalusian is a robust chicken breed which is known for their egg laying ability. The breed does best in warmer climates and free-range conditions, with limited confinement. The slate-blue plumage of the Andalusian is caused by a dilution gene, which, in combination with the E gene for black plumage, produces partial dilution of the melanin which gives the black color.
The modern Andalusian should be symmetrical, graceful, compact, medium in size, and stately in carriage. The dull and uneven blue colored fowl of the past has been transformed into the attractive, laced breed of today by years of scientific breeding. This is a non-sitting fowl, laying large chalk-white eggs. The skin color is white.