Evaluation of Different Induced Lameness Grades in Dogs: A Preliminary Comparative Analysis Using a Novel Sensor-Based System

Background: Canine lameness demands accurate assessment methods to guide clinicians in diagnosis, treatment, and rehabilitation. Technological advancements have played a pivotal role in enhancing the ability to objectively evaluate and quantify lameness. This study presents an innovative approach to the evaluation of induced lameness, using analysis software and a sensor-based system.

Materials and Methods: A mixed-breed dog served as the exclusive subject for this experiment. Lameness was induced using custom 3D-printed half spheres with various diameters that were strategically affixed onto the digital pads DP-3 and DP-4 ([Fig. 1]), as previous study has confirmed are major weight-bearing pads in dogs.

Fig. 1 The 3D-printed semi-sphere taped on the digital pads of the paw.

For additional validation, two external veterinarians were consulted to assess the video of the dog’s gait and assigned grades of lameness.

Results: The findings of this study revealed significant alterations in weight distribution and peak GRF following the induction of lameness. The magnitude of these alterations varied depending on the severity of induced lameness, with larger semi-spheres resulting in more pronounced asymmetries ([Fig. 2]).

Fig 2 Plot showing the influence of the semi-sphere diameter on the asymmetry index of the peak GRF

Conclusion: This study showcased the efficacy of a sensor-based system in objectively assessing the severity of induced lameness, particularly through the calculation of an asymmetry index. By quantifying alterations in weight distribution and peak GRF, this system serves as an innovative tool for monitoring rehabilitation progress in dogs, offering valuable insights that could enhance rehabilitation.

Publication History

Article published online:
12 September 2025