Won't eat
Lettuce
Pumpkin seeds
Pumpkin
Bananas
Alfalfa
Cabbage
Tomatoes (they sort of eat them)
Apple banana pear peelings
Cucumber
Why won't they eat them
My chickens can be really, annoyingly picky too. Before I got them hubby told me "they eat everything". NOT!
Mine eat some kinds of lettuce - love the crunchy ones like iceburg and romaine not so much on spring mix. Will eat pumpkin/squash/melon seeds like crazy! Won't eat bananas, cabbage, apple. Sometimes eat tomatoes, more into the cherries than the large ones. Cukes - mostly the seeds.
They LOVE blueberries, watermelon, earthworms, mealworms and meat. Throw in some ground beef/pork and they go absolutely crazy for it and it's gone in seconds!
Mine do pretty well with yogurt, bread, cooked rice/pasta, and eggshells (I crush them up in my hand so they don't look like an egg and they snarf them right down).
I give them the greens and other treats in the AM and their grain at night to give them something to do while they're stuck in the coop between when we close them in around 5 and when the light goes off at 8:30 PM.
Keep trying - sometimes mine will eat it one day, won't the next, etc. Fussy gussies!