Welcome to the forum Jim and Sybil.
Your dog does sound like he is indeed, a very 'lucky' lad

I am not a vet, neither do I have any qualifications in that field, but all my dogs have lived to see their old age. I have found with my own dogs, that once they reach a certain age (10-14) it is very hard to keep weight on them.They all eat well, but they still drop weight at an alarming rate. And it doesn't matter what or how much you feed them, nothing seems to help. All I do, is get a vet to check them over to make sure that there isn't some underlying problem. Then make sure that they have a balanced diet,exercise and love. Some dogs get obese in their old age, mine get skinny :rolleyes: It's not easy seeing them like this, but if the vet has given them a clean bill of health, and they are eating, happy and well in themselves, then I don't think that there is much more we can do for them. Old dogs do sleep a lot of the time, my lot usually find the warmest place, be it by the fire or in the sun ......and spend most of their time snoring and 'chasing bunnies' :D
For your own peace of mind, I would get the PDSA to have a quick look at him and make sure that he is ok. Apart from that .......enjoy him

Leigh