Do you leave kibble out as well? Could your dog just not be hungry if he has kibble or something else to snack on. I know sometimes my girl isn't in the mood. I usually put it in the fridge and try again later.
Lately though she eats it all up, some dogs just don't like the raw. I know mine prefer REAL raw then the NV but she does love this stuff too. She hardly ever touches the kibble that is out.
Do you break it up for him? Sometimes I have to hand feed