Hi there. My Pup is a 6 year old silver lab. I adopted him about three or so years ago. Over the past two he’s played with other dogs but always tends to try and mount the smaller ones constantly. Of course me make him stop. But he has to squat down low (he’s a taller lab)But after a night of rough playing and mounting he tends to favor a leg and limp on the other for either a couple hours or a day depending on the extent. Then he decides to lay on the hurting side. Though he does act normal besides the leg being key up. It only happens when he decides to mount. He goes on walks; we will play ball for an hour and run around and there aren’t any issues besides when he mounts. Has anyone had this issue? Or know what it could possibly be?