i was using aspen wood shavings,but i've switched to repti-bark now.i have wondered if it was a allergy to the substrate.i've had another look at him today and there is little cracks on his scales as well as the red blotches.i actually think more of these red blotches seem to be appearing.his wheezing/breathing seems to be a lot better tho.i just wish i knew what these red blotches are