I am curious about this for my geriatric great pyr. He doesn't have a displaysia but also doesn't have much mobility. Some mornings it takes him several minutes to get himself up. He hobbles around mostly and cant hold a seated position very long without shifting his weight. I think its his hind legs and shoulders that bother him the most. My sister has gone to massage school and she found a bunch of knots in his shoulders and released them, and he really liked it and fell in love with her for it.