I have only been a BP owner for 9 months now but I have not heard a single sound out of our snake except for once. A fart...and it was LOUD! It sounded like a human fart and she did it right after she pooped. It freaked me out at first and I checked about it online immediately(it was about 1 month after we got her) but I read other instances of them "farting" and she was acting normal so I figured she must be okay...

8 months later and she hasn't farted again.