The 1st treat I gave mine was cooked spaghetti noodles. THEY LOVED IT!!!!
Then bread in tiny pieces. They walked all through the yogurt, but ate some.
Then crushed up crackers and cereal, popcorn, cheeto type thingys. Bagged salad recently, cantaloupe on the rhind.
I gave them all of that before grit or anything. They only recently started getting grit (they are 10 wks now)
My younger chicks didnt know what to do with cereal or cantaloupe. I havent given them any noodles yet.