Its the second time iv walked in on my Dumeril boa sitting there with his mouth wide open. First time i walked in, i seen it and sat and watched and lasted maybe 1 min from when i walked in. Second time, same thing. Inside his mouth looked fine, from what i can see, no excessive saliva or bubbles. Whenever i take him out, i always check his nose/head/mouth area, looking for possible mites/RI etc. I also listen to the breathing, listening for wheezing, popping squeaking type noise. To this day iv never had an issue with anything iv described, other than the mouth open. Hes about 4.5-5 feet, last time i weighed him was cpl months ago, he was 16XXgrams. I always clean and poo and pee i see or can find, change substrate(aspen) every 3 weeks or once a month, fresh water every 3 days or so. I think i take good care of him, this mouth thing just has me thinking. Any help is very much appreciated!