I have had my BP since about February. Soon after I got him I thought he might have had a RI. I took him to the vet and they said he had a very slight RI and they gave him the shots to take care of it. At this same time I bought a new thermometer and fixed all of my husbandry problems so now my temps and humidity are all right on. The thing that worries me is that sometimes when he breathes it mikes a slight whistling sound. However, he has done this ever since I have had him and it only happens when he is flexing like hanging off of my arm and bring his head back up or anything that takes some effort on his part. When he is just sitting around or not flexing his muscles, he doesn't make the whistling noise. Is there something else that could be causing this? Its been going on for several months. Is my snake just a loud breather? Is this an on going RI? I hadn't been too concerned because he hides just like a normal BP and eats every week. What do you guys think?