Just as the titles says my Ball Python seems healthy. She eats weekly and seems as happy as can be but for most of the time I’ve had her through three sheds she has always whistled especially when breathing heavily. She doesn’t have mucus around her mouth or nose, no loose skin or blockage I can see on her nostril, she seems completely fine. I’ve heard there are some morphs that can cause normal whistling with no hard to the Bp. Any advice?