The Chicken teaches the hen to lay eggs.
More Bulgarian Proverbs:
Ravens do not peck each other's eyes out.Bulgarian
He that sleeps with a dog, should bear its fleas.
Bulgarian
The eye that sees all things else, sees not itself.
Bulgarian
Don't cry at somebody else's grave.
Bulgarian
A lion lurks in everyone's heart; awake him not.
Bulgarian
A lie has no legs.
Bulgarian