You can soften the chickens by marinating them, and you can also create different flavors.

Half a kilo of chicken bones
3 tablespoons of olive oil
1 onion
1 carrot
1 celery
3-4 stalks of celery
1 liter of water…

1 package Banvit Bonfile Göğüs
3 tablespoons olive oil
1 tablespoon salt
1 tablespoon black pepper