I have chicks that were recently hatched and was wondering if they would be considered sex-link and if so how could I tell. I have a Barred rock that went broody and other hens were laying in her nest. They other hens were buff rock, black Australorps, and partridge rocks. When 3 chicks hatched recently I noticed that one had a spot on its head with light colored legs while the other two did not have a spot and had dark legs. I realize that they could be a mixture of any of the hens but the obvious black legs lead me to believe they are Australorp. The daddy is a partridge rock who was recently killed by a hawk. I was wondering if If these chicks would be considered sex-link or even black rocks. I also looked at the chicken calculator and saw no difference in the mixture of these birds by percentage of color patterns.