My eight year old male currently has this but his symptoms are repertory related. (Thick mucus from the nose and coughing) My vet has prescribed Zinoquinn tabs which he has been on for 28 days with little results. He recently prescribed both Zinoquinn tabs for 28 additional days as well as Amikacin Sulfate inject able for 20 days. We've been on this regime for 10 days now with little improvement. I'm looking for any suggestions, thanks.