My pug / boston terrier mix occasionally chuffs and huffs like a horse with the heaves. What could be the cause of this? My old Yellow Lab used to do the same thing. Could it be heartworms? He’s 5 yr. old not neutered male in good health
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If he is not on Heartworm preventative then your dog could have heartworms. Why is he not on preventative? It sounds like it could be a heart problem and he should go to the vet. A vet is the only one who can diagnose Heartworms or another heart problem.