Comparison of ground reaction force measurements in a population of Domestic Shorthair and Maine Coon cats.
Authors: Schnabl-Feichter Eva, Tichy Alexander, Gumpenberger Michaela, Bockstahler Barbara
Journal: PloS one
Summary
# Editorial Summary Ground reaction force (GRF) analysis has become increasingly valuable in feline orthopaedic assessment, yet baseline data remain limited, particularly across different breeds. Schnabl-Feichter and colleagues used pressure-sensitive mattresses to measure seven kinetic and temporospatial parameters in healthy Maine Coon (MC) and Domestic Shorthair (DSH) cats, including peak vertical force, vertical impulse, stance phase duration, and step length, whilst controlling for body mass and total force normalisation. Although Maine Coons demonstrated higher absolute GRF values and longer stride lengths—attributable to their larger size and conformation—normalised force measurements and most gait parameters showed no significant differences between breeds, with only the time to peak force in hind limbs differing materially. Since Maine Coons are clinically over-represented in hip dysplasia and patellar luxation cases, yet display normal gait mechanics when healthy, this suggests that breed predisposition to these conditions may be driven by genetic factors, structural morphology, or developmental influences rather than compensatory loading patterns. For practitioners, these findings establish that apparently sound Maine Coons walk biomechanically similarly to other breeds, making GRF asymmetries or deviation from these breed-specific baselines potentially more clinically significant when assessing orthopaedic pathology in this population.
Read the full abstract on PubMed
Practical Takeaways
- •Maine Coon cats' predisposition to orthopaedic hind limb disease is not explained by abnormal gait biomechanics in healthy individuals; genetic factors and other mechanisms likely underlie the breed's higher disease incidence
- •When evaluating feline gait, raw force measurements must be normalized to body mass to allow meaningful breed comparisons
- •Clinical assessment of lame Maine Coons should not assume biomechanical gait abnormalities are present, as healthy cats of this breed show compensatory gait patterns consistent with their larger body size
Key Findings
- •Maine Coon cats showed higher absolute peak vertical force and vertical impulse compared to Domestic Shorthair cats, but differences disappeared after normalization for body mass and total force
- •Maine Coon cats demonstrated earlier time to peak vertical force in hind limbs compared to Domestic Shorthair cats
- •Maine Coon cats had longer step length, larger paw contact area, and higher body weight reflecting breed-specific conformation
- •Normalized ground reaction force parameters and symmetry indices did not differ significantly between breeds despite Maine Coons being over-represented with orthopaedic hind limb pathology