I agree it’s a fascinating dream. It makes me curious about what might have inspired it.
As to the question asked, I am really torn about it, especially when you substitute kids. I think I’ll read this thread through once more to see if that helps me land somewhere.
I think in the few weeks preceding it, I had watched movies containing some of the themes - Transcendence (nanomachines remaking things); Divergent (a wrecked city that still has people living in it); Army of Thieves (possible zombie stuff happening in the periphery).
In the evening preceding the dream, I did eat some spectacularly good cheese.
A large concern for me would be saving the dog suffering during its lifetime. If the nano-technology heals its health complaints completely painlessly, I might opt to do it, just because worry that my pet might be in pain and not showing it is constantly present in my life.
I would figure that if it lives to be 20, happily and painlessly, that would make the procedure worth it. I could set up a will by which the dog would be euthanised after my death, although more likely I would devote the rest of my life to setting up a fund and a chain of carers who would look after my pet. Heck, I might even consider having children, because suddenly there would be something precious in the family to pass down and worth protecting.
However, I wonder how such a long life might affect the dog’s personality. Dementia is not a problem, since the brain would get repaired, but do dogs get more anxious or more mellow with age, generally?
It varies - in general dogs get less playful, but some get mellow and others get crotchety.
But I think we can assume for the purposes of this thought experiment that the immortality treatment would preserve the dog in a state of perpetual post-puppy youth. Not sure if time alone would change the behaviour if there were no physiological changes ongoing.