Sex Link chickens are a cross bred that at hatch the cockerels are a different color than the pullets. ISA browns are not a sex link breed They were developed in France for their egg productivity by crossing several breeds. The result was bird that starts laying at 16-18 weeks and will lay over 300 eggs per year. However at hatch the chicks all look alike and they must be vent sexed.So I have a question for people with isa brown experience. I have 16 chicks ( think they're around 6 weeks now??) and I'm suspecting at least one if not 2 or 3 boys in the group. Is this common??? I thought they were sex links which means that there isn't much of an excuse for that many cockerels......
Or do they just develop everything faster??
Occasionally they are sold "straight run" where they haven't been sexed and you get what you get. If they are sold as "pullets" then you are paying a premium for all females. However, vent sexing is difficult and occasionally some males get through.