hungry hens/ not eating pellets

Hi
We have three hens, last few days noticed very hungry running to fence when ever we go out towards them
They are not eating the pellets
We have got some corn/seeds/meelworm and they are enjoying that ??
Should we try corn or other feeds like the pellet mash
Any suggestions very appreciated
Only one hen producing eggs at moment
All look well tails up and feeding just not on the pellets
Thank you

I agree with min200. Stop all food apart from pellets, they may go a day, maybe a day and a half at a real stretch without touching them, they will crow pathetically like they are about to die, look at you pleadingly with those little orange eyes but don't give in!. Eventually they will tuck into the pellets when they are hungry enough and they realise you have rumbled their little game  

They are optimists and run to the fence in case you have treats to offer, which often you do. You need to reduce amount of treats they are fattening and fat hens do not lay