An update on Ben's condition. He had his teeth cleaned this morning and the vet had to remove several teeth. A large tooth in the back of the mouth had a cavity that went all the way to the root. He never lost his appetite during the whole ordeal or seemed to have any sensetivity of his mouth. I hope this is the end of the suffering he was going through. He was a rescue dog so we don't have the previous owners records as to dental care he had in the past. You can be sure he will be monitored from here on out for any sign of tooth decay or tarter build up. Thanks to everyone who replyed to my inquiry on Basenji health.