Abstract

The objective of this paper was to compare the range of motion in Border Collies to that of Labrador Retrievers. Humeral circumference, thigh circumference and differences between sex and age were also compared. Twenty three (23) healthy Border Collies and 18 healthy Labrador Retrievers were used. A single investigator measured range of motion of the carpus, elbow, shoulder, hip, stifle and tarsus as well as humeral and thigh circumference under field conditions in 23 Border Collies and 18 Labrador Retrievers. Border Collies had a significantly greater range of motion (P<O.001) in all joints than Labrador Retrievers. Sex was a significant predictor of range of motion (P=0.010), but age was not (P=0.400). Range of motion significantly varied by joint (P<0.001) and the effect was different within Border Collies versus Labrador Retrievers (P=0.008). Range of motion did not vary between left and right sides (P=0.365). Considerations of range of motion were made in deciding pathology and progress based on type and breed of dog (sporting, herding, protection). Comparisons were made based on breed and from left side to right side.

Key words: Range of motion, goniometry, flexion, extension, and abduction.