There are only two colors for chickens. All are either red/gold or silver. Black is caused by pattern genes. White, both dominant and recessive, are genes that modify black. If a bird has white feathers with black patterning, it's silver based.Are there any breeds which the hens are for sure silver? Is there a way to tell if a white hen is silver? Or do I have to test mate each white hen before using her to make red sex links?