For a little while now I have noticed that my (8 month old) puppy often doesn't breathe entirely cleanly. It's most noticeable when she's relaxed and being petted (but not so much when she's asleep).
It isn't congested to the point that she's unable to breathe through her nose, but one can hear mucous being sucked down as she inhales. Occasionally one can also see a small amount of nasal discharge.
I raised this with my vet, but predictably the puppy wasn't exhibiting any signs at the time: he listened to her lungs with a stethoscope and couldn't hear anything wrong, so was fairly unconcerned and dismissed my report as likely to be attributable to a canine cold or heyfever (reminding me in the process that puppies, like babies, are still acquiring immunity against common infections).
That all sounds plausible enough, but the fact that it has persevered for so long without any improvement is beginning to make me wonder whether something else could be to blame.
Is it normal for dogs to breathe like this when they're relaxed (and I've simply never before noticed it in other people's pets)?
If not normal, how long should it take for a viral infection to clear in a young, but otherwise healthy, puppy?
If not normal and "chronic" (by virtue of not having cleared by the time that it should), does it warrant further investigation given that it doesn't appear to be causing her any particular harm? I suppose it could indicate a problem with her immune system, or even be a sign of some more serious ENT issue: but I'm not inclined to put her through a whole load of unnecessary tests.