Hello all, just some quick questions and maybe some suggestions on what I should do. I had my ball python out earlier today after I had been gone for about 5 days and he was wheezing (light hissing sound). Here are his cage stats:

Ambient cold side 75-80
Ambient warmside 85-90
Ground temp: 87-90 degrees (UTH regulated by T-stat)
Humidity 45%-55% (according to my gauge it had gotten down to 40% on the last night I was gone)
Related info: He has been off of feed for the last month. I came home last night and he took two f/t 13g adult mice. I was very happy that he finally ate. He has not lost weight. His estimated age is 7 months old and 206g, he looks very healthy. He is also past due for shedding. Last shed was about 8 weeks ago. This could be due to him not eating though. I had him out today and I heard what sounded like wheezing. He has no drainage, he is very active in and out of his cage and is otherwise not showing any signs of an RI.

So, all is normal except for the wheezing. I pulled down his lower jaw slightly and did not notice any excessive mucus, bubbles or anything else out of the ordinary. He is very well taken care of, I work very hard to closely monitor his temps and humidity. What gives? Any suggestions would be greatly appreciated!