I've been wondering for some time now, and I hope someone here can help enlighten me...what exactly is the purpose of sex-link chickens? I know that they can be sexed from the time of hatch, and I suppose that's worth SOMETHING, but I also read that the trait will not reproduce in further generations. So...if you purchase sex-links from a hatchery, they have an easier job sexing your new hatchlings...but it's worthless to the end user, as the trait cannot be counted on in future offspring. So why fool with them? It's like buying seedless watermelon seed...oh yeah, it's great to eat the seedless melon, but you have to buy seed again the next year, and I happen to like saving seed. Anyway, I was just hoping someone could shed some light on this for me. I have some RIR's and some BR's, and thouight they run together, when I get ready to hatch off some I intend to separate them for a few weeks prior to collecting my eggs for hatching so that they will be breed specific. I simply don't care for mixed breed chicks. Which brings me to another question...how long does fertilization last? If I separated the breeds today, how long would it be before the hen would lay UN-fertilized eggs, and then once the appropriate rooster were re-introduced, how long before the eggs would be fertile? I've heard several different ideas, and I'd love to hear from some of BYCer's experience.