If you listen to the B&B podcast, every so often you hear that Bobo can't make the recording as he is undergoing hypobaric treatments, lost the weight as his health wasn't the best and he needs to be fitter, and that he has several documentary projects in the works. All of that can have a tiring effect on a person. Frankly, his medical condition is no more yours or mine's business than ours in his. It's a sad side effect of celebrity that when one is overweight, he is kidded and criticized for it and when they lose weight the assumption is they are sick, a tweeker, or both.
I wish him well as I think he is a good dude and is going to be bringing us some fresh Bigfoot related material fairly soon.