My 13 year old pug has delayed proprioception in his hind legs, but I think his front ones are fine. Harder to tell. His hind legs seem to be getting very very slowly worse. Could that be caused by the same thing which caused some sort of central nervous system deficits a few weeks ago? Brief ataxia, head tilt, hypermetria. And/or the daily vomiting (and re-eating) which started a month ago, and was helped by famotidine. And/or his very recent new impulse to lick my comforter instead of his stuffed frog. Ewww! He had a bunch of vaccinations in early March, and then the daily vomiting three weeks later (plus one eye was red). Then about two weeks later the CNS symptoms. He was put on antibiotics and steroids and seemed to feel much better, and no returning CNS symptoms, but not sure about proprioception. The comforter licking started two or three days after the steroids stopped. He also had a much worse (but different) CNS problem two years ago around the same time and also I guess about a month after lots of vaccinations. Seemed completely better after two rounds of antibiotics and a month of tapering steroids that time. Could both of these CNS incidences actually be a reaction to the vaccines? (Or infected cat poop he eats in the backyard?) Is it possible that the two rounds of antibiotics really helped two years ago and he would benefit now from another round? Would a CBC panel show evidence for whether or not antibiotics would help? My vet says unless I get an MRI, all she can do is give steroids to treat the symptoms, so I'm looking for other possibilities.