Learning Objectives 1) Understand the 3 Hypotheses : Canine Hip Dysplasia, OCD, Immune-mediated Arthritis. 2) Learn what normal Range of motion is and how to test. 3) Learn was a positive Ortalani sign is. 3 Hypotheses 1) Joint Laxity Postive Ortalani sign Left Hip (unable to perform on right hip because of pain) Range of Motion reduce to 100 degrees No history of trauma Reluctance to climb stairs Uncomfortable sitting down 9 month old Rottie Disproportionate weight carried on front limbs 2) Joint irregularity No history of trauma. Large breed Young dog Free choice diet 3) Inflammation More likely to be in more than one joint. No history of trauma.