Vikki,
Please try to stay calm and relax, ok. He will be ok. I don't have experience with an AAI baby, but there are others that do. This is very serious, but now that you are aware and your Vet is on board, you will make everything right. I am not sure why your Vet isn't suggesting surgey though

- b/c from what I read, surgery is need to stablize the neck
Hang tight, I am going to try and contact Val: MyBabe4me - as she has soooooooooooooooooooooo much knowledge about this.
As for now, PLEASE KEEP HIM QUITE / CALM - NO RUNNING - NO JUMPING - Just relax him and keep him still. He is very fragile, as Val and others stated, YOU MUST TREAT HIM LIKE PRECIOUS CHINA
Please don't cry, we will help you. I will be back soon.