I have had ones with UTI hold because it hurts then let the flood gate open. I agree that only 3 times in a month makes a UTI not that likely... but there other things could be going on. Hopefully you figure it out soon.
Old dog vestibular disease
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Our dog Rascal is 14 years old. He was recently diagnosed with idiopathic old dog vestibular disease. The vet prescribed 10days of antibiotics and 14 days of Prednisone. At first he improved from unable to walk to having a head tilt and being slightly unsteady on his feet. The antibiotics were completed 2 days ago and we are tappering the prednisone. His symptoms are getting worse. I haven't noted any facial paralysis. The vet didn't see any signs of ear infection. He mention a visit to a specialist as the next step. Any similar experiences or advice?