feeding

they should have growers or rearers pellets fed ad lib all day. Then when they get to about 16 weeks start to change them over onto layers pellets but introduce these gradually over a couple of weeks 

Hens are not like dogs or cats they are grazing animals and as such they need feed all day. Just put some into their feeder and leave it down for them then collect it up in the evening. You don't need to be there when they are eating they will help themselves to it from their feeder. If you are finding that all their food ahs gone then you are not providing them with enough - this could create problems with fighting and pecking each other. Make sure you have a large enough feeder to hold more than they can eat in a day. I use a couple of feeders that hold 6kg each and before I got these they had a feeder that held 20kg but I found this a bit large for putting away at night.

thats exactly what I am saying 
Growing birds like puppies and children will eat more as they need more to help them develop. Make sure though that it is growers or rearers that you are feeding them on at this age. People give rough guides to how much but that is just that a rough guide. Most chickens will only eat just what they need unlike dogs or children   

I also scatter layer pellets during the day if I'm home, as if I go into the garden then run up for treats but don't seem to mind what.  They also free range all day so they don't just eat the pellets.

dont worry they will get the hang of going to bed by themselves soon