Yes, we had a stroller that we used a few years ago for a senior who couldn't keep up at 16+ yrs old. Last year I used it the last few weeks of my 15 yr old female's life. It gave her a lot of joy to be able to go along on walks.
Recently we borrowed a friend's stroller before we took a trip. Both boys were riding in their strollers. One is in end stage heart failure and the other is having arthritic issues. They both loved it.
And the bonus was that when we passed a woman walking two large dogs that she could not control and the one lunged at one of our dogs, the stroller protected him from injury. Scarey moment but it could have turned out a whole lot worse as the big dog went right for his throat.
So while I used to think dog strollers were silly, I'm a convert at this point.