Our 10 year old spaniel/New Foundland mix is overweight, and we started walking her. Two weeks ago after walking, she never stopped panting, and has been panting ever since. The only time she doesnt pant is when she lies with her head flat between her paws. Initially an urinalysis, thyroid profile, lab profile(CBC), lab profile (gen diag) were done. Then chest x-rays were done, and Prednisone, Ciprofloxacin, and Aminophyline perscribed.