Can you snowboard on the bunny slope after a hip replacement?

My boyfriends only 24 but got a hip replacement half a year ago. I'm just curious if he can or can't. After the surgery, the doctors told him he'd be able to run and play mild sports again after it healed and that they used extra strong metal the hip replacement since he's so young. But what do you guys think? It's scary cuz if something were to happen out there in the mountain...but he loves to board so badly! What if we only went on bunny slopes with no ice?

24 is VERY young for a hip replacement. The average age is usually the 60s & 70s. People that old might expect their primary hip replacement hip to outlive them. Your bf, however, cannot reasonably expect this and probably faces more than one revision surgery if he lives long enough. The question isn't "can he" because he probably can. Rather, the question is "should he" and that's more difficult. If he's interested in keeping his new hip for as long as possible then he could consider avoiding high-impact activities. Is snowboarding considered a "mild sport"? Did his doctor specify which sports are "mild" and which are not?
My concern with snowboarding (or downhill skiing) would be the accident possibilities. While I am more than happy to give you my opinion, it seems to me that his question about acceptable post-op activities should be directed to his surgeon if he's interested in preserving his new joint.

As long as he's healed all the way and is back to full range of motion in the hip, he can do what ever he wants. Hip replacements don't pop in and out just for the heck of it. As long as his surgeon has said that he can go back to sports he should go back to what he loved.