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J Biomed Transl Res. 2017 Sep;18(3):93-96. English. Original Article.
Hwang Y , Kim D , Kim G .
Veterinary Medical Center, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.

Locomotion can be investigated using visual locomotion scoring or computer-assisted techniques such as force plates or pressure plates. Although visual locomotion scoring is inexpensive, it is subjective and depends on observers. Conversely, computer-assisted techniques are objective and more sensitive than visual assessment. Many studies of gait in large breed dogs have been conducted using these techniques; however, there have been few investigations of small to toy breed dogs. Therefore, the purpose of the present study is to conduct gait analysis in small to toy breed dogs and to suggest normal reference ranges for clinical application. Twenty healthy dogs with no lameness or orthopedic pain weighing from 2 kg to 12 kg were used. The dogs were divided into two groups according to their weight, after which gait analysis was conducted using a pressure plate. The pressure force ratio between the forelimb and hindlimb was significantly lower in group 2 (mean 4.2 kg) than group 1 (mean 10.4 kg), while the stance time ratio between the forelimb and hindlimb tended to increase in group 2, but there was no significant difference. Other numerical values in group 2 tended to decrease, with some significant differences being observed. Overall, the results suggest that there are different gait features in small to toy breed dogs when compared with middle and large breed dogs.

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