Hello friends I noticed this evening when I had my pastel out that he was making a wheezing sound or a whistle when he breathes. He is a 2010, has never had health problems, weighs a little over 600g, eats well. He didn't eat for a couple weeks this month but is back on now. He has always had perfect sheds. What I have don't differently is changed the bedding I was using from one brand of cypress mulch to another. Perhaps it doesn't hold humidity as well. I have sprayed down his tub good to get the humidity. I am concerned because I have never come across an RI before. He has no mucous, no bubbles, and no gunk on the sides of his tub. I want to help my baby. Is there anything else I can do? I am hoping to avoid a vet visit but I will do whatever I need to. I have 2 2011 bps that seem fine in the same rack. Any advise or information welcome. Thank you