This could be from different things, so it's hard to say. The first thing that comes to mind is seasonal / enviro allergies, which can cause breathing issues just like this. Any other allergy symptoms? Does he chew/lick his paws? If so, probably has allergies. There is an allergy thread in the Health Library section.
Could also be that there is a tooth infection that is boring a hole toward the nasal cavity and if that's a possibility - he needs to go to the vet NOW to get this treated.
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~
°¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |