I feel your pain and understand perfectly. We have a 12 year old diabetic and blind (from diabetes) pup thats loosing her mobility now and the time is getting close. We enjoy everyday with her best we can. No more pups for us. My wife and I cannot stand the grief of loosing them. We are empty nesters so the pup is our kid and we lover her dearly.
The last year we've had to adjust our lives for her. She cannot be left alone for more than a couple hours so someone has to be here all the time. She gets insulin injections 2 times a day (very expensive) and with her loosing her mobility, someone always has to be near to help her get on her feet.
No camping this year at all because she cannot go so we stay here, for her.
Like I said, I understand perfectly. You have my prayers and sympathy.