I've just read an interesting article.
A researcher has found a way to GM eggs so that s.ex of chicks can be told before they hatch.
So which is worse, killing loads of day-old cockerels, or destroying them before hatching. Or killing for the table a few weeks later? And is GM always the bogeyman.
An interesting question, I don't think there's an answer. He makes out it's ethically better, but I suspect it's economic that leads the way - as it does for all the back yard hatchers who dispatch their cockerels.
Another question arises. If the ideal ratio of M to F is 6? / 1, and the ratio that hatches is 1/1 what happens in the wild. Do they kill each other?