Capsaicin (the hot in peppers) only burns the tongues of mammals, not birds.
So chickens can eat cayenne just as easily as people can eat a bell pepper.
Clever idea, using soap!
A friend of mine once had some very determined egg-eating hens.
The hens were given an egg-shaped rock, and my...
That is a good point. The chickens don't seem to care whether it was sold as a "nest egg," or whether it is a rock or a golf ball or something else. As long as it's about the right size and shape, that's what counts.
I agree that your chickens are probably eating eggs.
But I'm not sure it was caused by feeding them eggshells. There are many other things that could be involved, even though it did start right after you fed them eggshells.
Maybe, but maybe not. It's probably worth spending a bit of time...