Either your chickens are too old or too young; in both cases they won’t be laying any eggs for you. Young hens or ‘pullets’, typically start laying eggs at 18-20 weeks old and their first season of laying will be their best. Trying to encourage a pullet to lay before they are 18 weeks old is futile because their bodies haven’t developed enough to lay eggs yet. Once a hen gets to around 4 years old the amount of eggs that they lay starts to slow down considerably and you will find they don’t lay that many eggs anymore.