I gave mine grapes - they would do anything for one! They also got lots of fresh veg as well as their chcken meal and some cooked scraps. I would also dig a hole for them to scrabble about in ocassionally. They also liked egg (cooked or raw if one of their own). Don't forget the grit though.
Just remember though their eggs taste of what they eat so don't feed anything with fish! I learned this after they stole the cat's food
Good luck with them.
