Has Hens Got Teeth?

A new study shows that chickens, which don't have teeth, still have the genes that make them, and in special cases, those genes can be switched back on. Scientists now think that as animals evolve, they lose the ability to turn those genes on at the right time during development — not the genes themselves.

Do any hens have teeth?

This is because, like other wild birds, chickens have no teeth. Oh sure, a baby chick grows an egg tooth which helps it break out of the shell when it hatches, but that sole tooth falls off a few days after hatching. So for all intents and purposes, chickens don't have teeth - instead they have beaks.

What are hens teeth?

Also, scarcer than hen's teeth. Exceptionally rare, as in On a rainy night, taxis are as scarce as hen's teeth. Since hens have no teeth, this term in effect says that something is so scarce as to be nonexistent. [