I have an adult male that I've had for 1 month who lets out a loud "hiss" sound a couplet times a day. It's pretty loud! The first time it startled me, but now I am used to it. Other than that, and having not eaten yet (but it was paired up for some time), I have no signs that it's not healthy. Weight is good, no bubbles or lifting head, etc. Does anyone else's ball do this?

Right now he's in shed, and I am watching him actively slide around cage trying to roll the skin off.