Hello Jertzee.
This is my list but is by no means definitive. I'll start the ball rolling and I'm sure others will add their bit to.
The obvious is Layers Pellets. Ad lib during the day.
Mixed corn or corn. A couple of small handfuls an hour or two before bed.
Hens are omnivores so will have a go at a great many things.
The slightly distasteful things are: Slugs, flies, butterflies, frogs, newts, mice, dead animals including each other...Shudder....
Meat. Always a mixed variety of opinions. I personally don't feed meat but if they find a frog, worm, slug etc well lucky them. A sick chicken can be fed tinned cat food but please not chicken variety, again that's just my delicate sensibilities.
An occasional tin of tuna in spring water, not brine as too salty.
Spaghetti...fun fun fun!
Rice and pasta.
All green leafed veg including broccoli and cauliflower. I try to feed raw but if you had cabbage etc. for dinner that was of course cooked that's good to.
I like to thread cabbage leaves on a piece of galvanised wire so that it looks like a cabbage Christmas wreath and suspend it within pecking distance. They are very comical to watch as it swings around as they try to get a peck in. It is also a useful way of giving them something to do and means also that you don't have to pick up the skeletal hard woody pieces they don't eat. It's usually still attached to the wire at the end of the day and can easily be slipped off into the bin.
All fruit except citrus fruit.
Advocardo pears. They will eat the flesh and leave the stone and skin.
Corn on the cob even when you have eaten it the hens still get plenty off the cob.
Peas, cooked or defrosted.
Beans, mine won't eat hard woody runner beans (other peoples will I believe) but are happy to eat broad beans if you open the pod for them.
Root veg. As long as it's cooked eg potatoes, parsnip etc.
Bread (very sparingly) viewed as a treat, soaked in water.
Left over porridge or breakfast cereals.
Rasins but sparingly think toddler portions.
Nuts again think toddler portions.
Sunflower seeds in or out of shells.
Wild bird food.
Meal worms, a BIG treat as they are rather expensive.
Pop along to your local independent green grocer and ask for their trimmings. When they receive cabbages, cauliflowers etc from their supplier they come with all their outer leaves that need to be trimmed off, they also dispose of bruised fruit and the occasional potato that is too colossal or has been damaged.
Hope this is enough to be going on with!!!