Hello, I recently got 11 ex battery hens which are my first chickens ever. Im realy confused about what and how much to feed them. Between the 11 of them, I feed 3 cups of pollard (i think its rice in powder form??? im not too sure) mixed with oats in the morning and then 2 cups of mixed grains in the afternoon. They have about 15 metres x 5 metres of space to run around in so i guess they eat some grass ad bugs and stuff too. I also give them some lettuce or something similar fairly often. Is this enough food and are they getting all the nutrients they need?!