Hello. Hope is such a cutie! A cough may be due to inflammation, irritation, infection or something more serious like heart disease, heartworms or some primary lung disease. Hope does not look like an old dog, so a serious problem is less likely. If you have any honey, this is a great, natural way to ease a cough. Give her a teaspoon every 3-4 hours & if the cough continues & worsens into tomorrow, do have her evaluated by your veterinarian. She may benefit greatly from some medications, such as antibiotics or a cough suppressant. Thanks for using Petco Pet Education Center, formerly Petcoach.