Hi Barb! Oh mh goodness, you sure donjave a spunky Yorkie in your hands!!  He sounds like a very determined  fella'.

I'm  glad your Rehab Vet is gett second opinions lon whether your pup is a good candidate.  

In general here, we say age is just a number.   Other factors are attitude, overall good health, as well as considering the life expectancy  of certain breeds, etc., 

It sounds like more assessment  is needed to ensure your pup is a good candidate. moreso because of his back issues rather than age. It would have to be determined definitively  that the paralyzed leg is confined to that one leg and other limbs are. not affected due to the back surgeries.  

So continue  to get professional  opinions  and have your pup  thoroughly evaluated.  I would definitely  have him see an Orthopedic  Specialist  in person.  That Specialist  can help you make a determination that's  best for your pup.

 Maybe  even a little wheelchair could ve an answer.  Discuss  that with your pup's team too.  That could help eliminate any potential back issues too.

BTW, YES, we have had senior dogs kn thst ahe damge have amputations and do well for whatever remaining lofe span rhey may have.

Two dogs who come to mind are Shooter and Samson.  I believe they were fourteen and fifteen at the time.  

We'll look forwatd to updates, and we would love pictures too!  His avatar  is adorable!!

Hugs

Sally and Alumni Happy Hannah and Merry Myrtle and Frankie too