title: Quantitative Comparison of the Walk and Trot of Border Collies and Labrador Retrievers, Breeds with Different Performance Requirements.
abstract: BACKGROUND
  We hypothesized that breed differences of Border Collies and Labrador Retrievers would be reflected in the temporospatial characteristics of the walk and trot.
  
  
  METHODS
  Twenty healthy Border Collies and 20 healthy Labrador Retrievers made three passes across a pressure sensing walkway system that recorded quantitative temporospatial information at a walk and a trot. The following variables were measured for each dog: velocity, total pressure index percentage (TPI%), ratio of weight borne on the thoracic vs. pelvic limbs (T/P TPI%), stance time percentage (ST%), and thoracic limb stride length (TSrL).
  
  
  RESULTS
  The mean T/P TPI% for Border Collies at a walk and at a trot were significantly lower than for Labrador Retrievers (p = 0.0007 and p = 0.0003). Border Collies had a significantly lower ST% than Labrador Retrievers for the thoracic limbs and pelvic limbs at a walk (p = 0.0058 and 0.0003) and the trot (p = 0.0280 and 0.0448). There was no relationship between ST% and TSrL in Border Collies and an inverse correlation between ST% and TSrL in Labrador Retrievers (p = 0.0002).
  
  
  CONCLUSIONS
  Key quantitative gait differences were identified in Border Collies and Labrador Retrievers, which could potentially provide each breed with an advantage for their working function.
authors.affiliation: Veterinary Orthopedic and Sports Medicine, 10975 Guilford Rd., Annapolis Junction, MD, 20701, United States of America.
authors.forename: Brittany Jean
authors.initials: BJ
authors.lastname: Carr
authors.affiliation: Veterinary Orthopedic and Sports Medicine, 10975 Guilford Rd., Annapolis Junction, MD, 20701, United States of America.
authors.forename: Sherman O
authors.initials: SO
authors.lastname: Canapp
authors.affiliation: Veterinary Orthopedic and Sports Medicine, 10975 Guilford Rd., Annapolis Junction, MD, 20701, United States of America.|Zink Integrative Sports Medicine, 12701 Folly Quarter Rd., Ellicott City, MD, 21042, United States of America.
authors.forename: M Christine
authors.initials: MC
authors.lastname: Zink
mesh_terms: D000818:Animals; D001835:Body Weight; D004285:Dogs / Q000502:physiology*; D005121:Extremities; D005260:Female; D005684:Gait; D008297:Male; D013045:Species Specificity; D016138:Walking