My dog has been carrying around an abnormal hacking/cough for quite a number of weeks. When she "hacks", it sounds like she needs to throw up but nothing has ever come up. She has been tested for a number of things. She had blood taken, stool sample evaluated and her lungs were x-rayed. The vet thought she might have a lungworm and my dog was put on meds for 14 days. The coughing definitely subsided but now she's finished with the meds and there is still some coughing and I'm getting rather concerned as to what this might be?? She definitely does NOT have kennel cough. Otherwise, she's as healthy as can be - eats well and is energetic. Still, I'm getting more worried because even the vet is puzzled that she hasn't gotten better. Any ideas of what she might have??