All of the "something" bars are auto sexing, which means that they will breed true to the original parentage and remain auto sexing as long as they are not mixed with any other breeds. Now, they are expensive, and it would be nice to be able to tell at hatch which ones are pullets, however, what is one to ethically do with that information? Cull the roos at hatch? Grow them out separately? Give them away, or sell them? Also, the genetics of breeding your own stock don't seem to be that difficult... unless I'm missing some critical information here. Option #1 seems to be no more ethical than what the hatcheries do with the excess roos. Option #2 doesn't seem to be any advantage over waiting for a straight run batch of chicks to start showing their sexual characteristics. Option #3 would work, as long as the recipient knew exactly what they were getting. It would be awful easy for a breeder to take advantage of a newbie with this method of disposing of the males... How many stories do you hear of folks buying a pullet from a BY flock only to find out that it's a male???