My chickens are not laying any eggs?

so i have 7 chickens 1 is 3 years old and 2 of them i don't expect any eggs from and the others are all young. they all were laying eggs until 2 of my chickens went broody and hatched 2 chicks and now none of them lay... i provide them with scratch grain and layer pellets of good quality. they have a pen of 8.62 x 6.85 metres of dirt and we are getting some strong gr put down soon for them. their night coop isn't that great but we are also getting a new one of 1.5 x 1.5 x1.9 metres. what am i doing wrong? they were all laying before.. any advice?