I've got a very loud breather too. Her "normal" awake breathing often sounds like panting, it's enough to shake the bed from side to side (so no sleeping on the bed for her, it keeps me up!) For her I know it's "normal", but if it was something new then I'd be concerned too...hope you get some answers!
Solomon - black DSH - king of kitchen raids (11)
Gracie - Mutterooski X - scary smart (9)
Jaida - GSD - tripod trainwreck and gentle soul (4)
Heidi - mugsly Boston Terrier X - she is in BIG trouble!!! (3)
Audrey - torbie - sweet as pie (11 months)
Patrick - blue - a little turd (but we like him anyways) (6 months)
Boo, our Matriarch (August 1 1992 - March 29 2011)