Well, at times I've noticed my BP will open his mouth real wide and let out a hissing noise. He's not hissing at anything when he does this either. It's like he's doing it to blow a big puff of air out. It just makes a weird noise when he does it. It's like a hiss with a high pitched noise. Do any of your BPs do this? There's a possibilty that he has a RI, which the Vet I took him to said he doesn't, but anyway could that be a symptom of that? Thanks.

