Marma, I don't think your father in law should have lost much weight at all. He might have had a sore throat and probaly some in the thraot area for a couple of weeks, but if you raed the post, the peole that lost weight big time lost all of the teeth , a good bit of tongue, parts of the floor of the mouth plus whatever else that had to go. NOw some even have jaw bone exposed and that hinders eating too. You can't get much nutrition if you don't have the equipment to swalow it right or chew food..anything tougher than a soft mush just doesn't work.