
You may have difficulty, certainly initially, in getting your dog to take a dry kibble having been fed a moist diet previously. I've used all three of the foods you've mentioned and prefer the moist ones however they are pricey depending on the amount required. ND works out slightly less expensive (or used to anyway) than NM - so a case of personal choice and finances there really.
JWB is IMO one of the better dry completes but TBH has not suited any of my dogs and I've used several different recipes. It would probably be best for you to contact JWB and have some samples sent out and see how your dog reacts to a dry kibble diet.
regards, Teri :)
Edited to add: re negatives, no one food or regime suits every dog so much as anyone will be happy to convey their own experiences your dog may not have the same results, good or bad, as those belonging to other members ;)