Interesting.....
I bought 4 nest eggs today, and I'm going to try mustard tomorrow.
I tried to separate my broody hens, but they flipped out and wouldn't go back to the eggs, so I put them back.
I have an egg eating epidemic... I filled an egg with siracha sauce. They loved it. At least it seemed like they did anyway. They are eating eggs from under my broody hens, and I'm losing a lot.