Photonic
Ad astra!
They can be induced to grow tooth buds too. Now, creationists, why did the Intelligent Designer build that in? And whatever contorted excuse you come up with, isn't descent from toothed ancestors an altogether simpler and more satisfactory explanation?
Here is the best part about it. There is a genome that activates that prevents the chicken from growing the tail. All you have to do is stop it from activating and boom. Tailed chicken.