Pardon me if I make a mistake, this is my first time ever using a forum. But here it goes. I have a roughly year old normal ball python. The past 2-3 weeks I have noticed a slight whistling noise when he/she breaths. I have 3 hids in the 40g breeder. 1 with no heat source near by, 1 ontop of a heating pad (covered in sheddings of course), and 1 under the lamp. The lamp is a 75w day bulb. No light at night. The BP has been staying in the no heat source hid. Active a few times a week roaming around the cage. Eats 1 thawed mouse every 1 - 2 weeks. Never refuses. I checked inside the mouth and found no bubbles or discharge. Been about a month since last shed. Any ideas what this could be?