Howdy!
Our daschund had the same type of back problems. We noticed he as having problems with his hind legs and showed signs of being in pain. We took him to our vet the very next morning. Our vet then had us take him straight to another vet in Houston for surgery. Our local vet advised if we had waited on the surgery he would have been paralyzed and not have use of his hind legs. The surgery was successful are he is doing well even years later. I wish you well with your fur baby and your wife’s health also.
“Happy Trails “
Chiefneon