I wasn't sure if this was a normal boxer thing, Tyson breathes pretty loud through his nose. I mentioned it to the vet along with his runny nose at his last appt and he gave me some antibiotics to give to him just in case and they didn't seem to help. It's mainly when he's excited or breathing heavily but it's something that our Border collie doesn't do which made me thing it's just a boxer thing. The vet did mention that sometimes with dogs that have shorter muzzles can have small passages in their nostrils that can be fixed with surgery. I want to see if anyone elses boxer is like this before I go and get some kind of surgery that I don't need...