Don't worry, it is likely just "reverse sneezing." My beagle used to do it to, very frequently actually, and I would think, "Oh no! He has kennel cough!" Then eventually I called my vet and was reassured it was likely just this "reverse sneeze" thing which sounds like hacking and snorting. I took him to the vet anyway and sure enough my beagle was just reverse sneezing and this is very common in beagles. They gave him a cortisol shot (or something??) and said that would help his breathing a lot and would prevent him from doing this all the time, and it has worked very well. They said he could get one of these shots every 6 months or whenever needed, but Hector hasn't needed once since his first one. Hope this helps