What are some good exercises for stiff hips
Horseback riding. A lot of my friends do it for hippotherapy. Proper riding can loosen muscles and strengthen. I would suggest that you find a facility that does it, and not hop on any o'l horse :)
Side leg lifts. Lay on your side and lift your leg. Then switch legs.
squats lol they are all legs and hips and stretching deffinately
HIP SWIVEL. i think, idk. lol. Got this from a show.