let me first say, i do love my animals,(fish, dogs, and a cat) well maybe not the cat so much,, lol im not a cat person,, and i do understand that people treat/feel that they are their kids.
You got 14 great years out of him, i know it hurts, but put him out of his misery. In the long run he is an animal and he can not care or speak for himself. I am not trying to be mean or sound like an ass but you gotta think whats best for the dog not for you. I have had to put 3 dogs down due to illness/old age,injury and it sux. Ive seen a 60 year old man ball his eyes out but in the long run it is whats best for the dog.