An owner brought in a dog that was coughing like he had something caught in his throat . He would cough so hard that he gagged and spit up a white , foamy , slimy material . He ate and drank just fine but just coughed all the time . The dog 's history revealed that he was boarded a week before , and he also had received his Bordetella or " kennel cough " vaccination a month prior .
How may the dog be feeling right now ?
A. Sad
B. None of the above choices .
C. Sick
D. Happy


C