If your dog is 'ok' and not suffering in pain, I would suggest that you take this time you have and just give him what he wants to eat. This will allow him to feel your love and time for the family to process his decline.
(Last year our Siamese cat was dying of liver failure. I knew it was really bad and so did our vet. My husband could not accept that for a couple of months. We tried everything, the RX'd food, medications, lots of love. I even bought baby food and fed her from a spoon. I made chicken livers and pureed them to entice her appetite. This gave us 6more months with her before she passed away.)