Our 7 year old mix breed dog has been coughing since November. We've had him on prednisone and 2 different kinds of antibiotics with no luck in clearing it up. He did seem to be getting over it when we were coming back home from Indiana from the holidays.
Took him into the vet yesterday and they did blood work on him which showed he had a very high white blood cell count. They did more x-rays and he's got some blurry white areas around his lungs. Left side is worse than the right. Nothing was wrong with his stomach. His x-rays have changed since the first set was ran. They did say his liver was a little large mostly due to the prednisone. They have no idea what to suggest. Other than retesting his blood and doing another transtacheal wash, which we already did with no answers. Can you give us some other suggestions on which route to go? The only things that have changed in our house around November is we got a new air cont/furnace, an air purifier and switched his dog food to Hills Hypo-Allergen.
Thank you

