My dog didn't know what to do with his turkey neck initially. After pouncing on it a few times and licking it for a while, he finally laid down and got down to business.
Next time, try giving it to him on an empty stomach, if you didn't already. I probably would have just wrapped it up in a plastic bag and put it back in the fridge or freezer and offered it again at a different time. I have never personally had a dog absolutely refuse raw, but I have limited experience in that I've only offered RMB and MM to my last six dogs, but I guess it is possible that one might refuse it.