Diarreah is not a symptom of heartworm (fainting, respiratory difficulties like asthma, coughing, loss of weight), but they do always want to test before giving heartworm meds to make sure they don't have it (not really sure of the reasoning). Your vet is probably just getting him on the heartworm and nothing more (probably as a worm preventative more than anything else right now).
What meds did they put him on? Is he doing better or does he still have diarrhea? |