Kent, try using a mallet to crush those chicken necks alittle before you give it to him. And I would give it to him at a mealtime without the kibble. He will choose the kibble over the "new" thing that you are trying to introduce him to.
The raw chicken wings, necks or knuckle bones should be thawed. You risk your dog breaking a tooth if you give it to them frozen. I've been told that partially thawed is OK but I don't feel comfortable doing that.
Philippa, when a dog is given a raw chicken wing, or chicken or turkey neck, they will usually eat the whole thing, bones and all. They can literally crush those bones with their teeth which is why it is so good for keeping their teeth clean.