it should subside in a week or 2 - drink lots of water after your shake and lay off soda pop ,and salt .

It might not be the protein. Whats the rest of your diet like? Do you eat a lot of grains, legumes or dairy? All of those can cause gas and bloating do to poor digestabilty. Even large amounts of broccoli can cause gas. If you eat any of those foods, I would recomend removing them from your diet one at a time for at least 2-3 weeks each and see if symptoms improve. Id be willing to bet removing grains, legumes and dairy from your diet will fix your gas problem. Or you might get lucky and only need to remove one of them. Personally grains make my whole body swell up and the next day my butt hates me, along with anyone else I'm around.

Try getn your protein from lean meat instead of shakes. Might help your body break it down easier?

Have you ever drank kombucha? It's a drink made from fermented tea. The tea is fermented with probiotics. I don't know if you have a whole foods in your area. They normally sell it. I drink about a gallon and a half a week. Usually about 8 ounces post breakfast and dinner. It's really improved my digestion.

I call this problem progress.

What type of protein man? Some make me bloated and fart like there is no tomorrow, then some are super smooth on my stomach.