Your pictures remind me of a grotesque sight that I saw at the West Palm Beach Farmer's Market. Big sign - NO DOGS (except service animals). Some old bat couldn't bear to be parted from her dog for the hour or so that it took to look at every single stall. She had her nasty little dog in a closed carrier like the picture on the left. I noticed the thing growling at some kids who were looking at it.
The Pug probably needed a stroller lest it drop dead from overheating/exercise induced asphyxiation due its freakishly shortened muzzle.
As for the Golden, I have to assume it was paralyzed or otherwise disabled because I can’t imagine insulting my dog’s dignity by pushing his big ass around in a baby stroller.
[I have, however, considered hooking a cart to his harness and having him pull *me* around]
:)
I can understand putting a dog in a stroller, but only if the dog is lame and really can’t walk any kind of distance. I can’t tell with the first one, but the dog in the second picture you posted has a lot of white in the face and may be very old.