how does a 4yr old less than 2 lb. chihuahua go from being fine to not being able to walk the next morning?
was fine last nite til he had to come in from going potty for the nite, played with a couple of dog friends an hour or so before . . . . had trouble getting up the steps to the house. progressively got worse & his whole back end was non functional . . . to the point where he was dragging himself around cuz he couldn't stand on his back legs.