If he has managed to swallow the food down I would assume that the kink is not that severe and not preventing him from swallowing food?

I am curious what is your set up?

Do you have him alone in a 6 Qts tub on Aspen bedding? Do you handle him any?

It can take time I had to assist a female a few years back for 6 months before she finally started eating on her own.

Now if you have done everything right (again husbandry is VERY important) and the deformity prevents him to eat on it's own and at this point I am not convince of that than you will have to do what is right for your animal.