Actually, I do not know that.
If the extra eggs required more expensive food, the current system might still be the most cost-effective way to produce eggs. And of course the commercial producers are really seeking the best ratio of eggs produced to dollars spent, no matter whether it's more hens eating cheap food or less hens eating expensive food.
It may not be profitable, true...but I have a feeling that if this was possible, this wouldn't be the first time we'd be hearing about it. I mean, I've been on this site almost 7 years, you've been here about 4 - think of ALL the crazy stuff we've read on here in that time.
If producing more than one egg per day was a thing, at any cost, we'd have heard about it.
