[ashtonbaker]

They don't feed male chicks - from the first paragraph:

> in the United States alone, approximately 350 million male chicks are routinely culled each year, typically by methods such as maceration (being ground up alive).

[jacknews]

but they'd save on incubating the eggs which they could otherwise use or sell.

[ashtonbaker]

I suppose that is true. But I imagine that the scale of egg incubation to produce hens is a relatively small portion of total egg production, since each hen produces many eggs. You'd probably have to compare the cost of incubating an egg and the labor to manually sex the chick to the per-egg cost of this technology. I would be surprised if that comes out in favor of the in-egg-sexing tech right now, but it would be great if it did.