So sorry to hear that Chris, it sounds like Kip had a great life and you were there at the end - upsetting, but part of Kip's life that you got to share.
I always regret that my Rasher (14) went off to die on his own. In fact, he had tried to curl up at the back of the garage as I left for work one morning at 6am and I shooed him out into the garden. We never saw him again.