Hello Herbie,
Please don't be sad, try and see the truth which is that your dog was poorly and you did the most you could for him, it wasn't fair to keep him alive and let him be ill, and that's what you saw. You did a very unselfish thing yesterday and your pet will be proud. Also he was very old and I do beleive he lived a very good life and lived longer because he was happy x
I had to do the same thing two years ao with my staffie, she was 15 years old and I loved her so much, she knew when I was upset and in her own way could comfort me. I'll never forget her and hope one day when I have to go she'll be there waiting, no one could ever replace her but I cherish all the happy memories I had with her x It was a very sad time to see her go to sleep one last time, but she was free from the pain....as will your beloved pet, no more hurting for him now, and no more hurting for you..keep strong, he's happier now xxx