Hi, Lori in Los Angeles. My german shepherd mix had allergic bronchitis and would get the reverse sneezes. She would also get bad coughs from the allergies. If it wasn't too bad, I would use benedryl. When it got really bad, sometimes her vet would put her on a short course of prednisone. I had a tracheal biopsy done on her early on because the vets originally thought it was kennel cough. You may want to have him checked about by the vet to make sure it's nothing serious and to do some allergy testing. Also, when the reverse sneeze starts, you can try a distraction with Ziggy, get him to walk or move or do something–this would interrupt mine's sneezing fits.