Hi all, I'm new, so if I am doing something wrong, please do let me know. I have been raising chickens for about 3 years now, but have had chickens off and on for years, so only a newbie on the forum. This April, I went to Tractor Supply and bought some Cornish Cross, two Amberlinks, and the salesman said he had some black chicks that he had no idea of the breed. He said the hatchery didn't send them with any info other than the fact they were straight run. I thought it would be fun to be surprised so I bought three. They all were black with a white belly and chest, no spots on the head. I wish I had thought to take pictures when they were young, but I didn't. Once they started to get in their first set of feathers, two had some brown around their head and necks and the other one was pure black. I am 99% sure the largest is a rooster. He is much larger than the other two and has that cockerel swagger. He feet are half again the size of the smaller ones. He started getting black greenish feathers on his back in the past week or so. The middle one acts more like a hen but also has the brown on the neck. A few days ago I was taking pictures and noticed that the large one is starting to get white specks on its neck and head. Does this mean that they are sexlink even though they were identical as young chicks? I was under the impression that sex links mean you can tell what sex they are from the beginning? Next time I'm not buying surprise chickens because this is driving me crazy. They are roughly 6 weeks old in the picture.