I have a BRB with a kinked neck that I produced in 2014. It eats, poops, sheds, etc. just fine. Many breeders would have culled it but the kink wasn't in a bad place so I gave it a chance at life. The only husbandry change is that I give it 2-3 small feeders instead of an appropriately-sized feeder as a meal, as I'm not sure how far the kinked area will stretch.
I could be talked into letting it go to a pet-only home but I'd have to absolutely trust the new owner, and there would be a contract that if the new owner didn't want it any more I would get first right of refusal on it.
Also I don't think the kinking is genetic, the dam had 25 babies and this kinked one also hadn't absorbed all of its yolk either. The other babies were fine.
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