All a sexlink is is a term used to describe a type of chick that links specific genetic attributes from the parents that produce a trait that allows the sexing by color at hatch time. Black sexlinks are all black at hatch except the roosters have a white spot on top of the head. Red sexlinks are hatched red for the hens and white for the roos. Parents must contain the right genes. The ones in the picture resemble meat birds but I'm not sure they are too young to tell.