Dynamic and Postural Changes in Forelimb Amputee Dogs: A Pilot Study

Area of Science:

• Veterinary Science
• Biomechanics
• Animal Orthopedics

Background:

• Limb amputation in quadrupeds can cause compensatory overload on remaining limbs, particularly the contralateral limb.
• Forelimb amputation presents a higher compensatory challenge for dogs.

Purpose of the Study:

• To objectively assess weight redistribution changes in dogs with amputated forelimbs during standing and walking.
• To compare the stability and kinetic parameters of amputee dogs with intact dogs.

Main Methods:

• Conducted static (postural) and dynamic kinetic examinations on French bulldogs with one amputated forelimb and a control group of intact dogs.
• Utilized force and pressure platforms to collect ground reaction force data.
• Employed the student t-test for statistical comparison of results.

Main Results:

• Ground reaction force parameters were significantly higher in the amputee group compared to the intact group.
• Despite increased forces, postural examinations revealed that amputated dogs achieved comparable stability to healthy dogs.
• Tripedal support in dogs did not objectively result in a quantitative loss of balance.

Conclusions:

• While dogs can maintain balance after forelimb amputation, the increased force on the remaining limb and altered support phase mechanics may predispose them to future musculoskeletal injuries.
• Objective assessment of weight redistribution is crucial for understanding the long-term implications of limb amputation in quadrupedal animals.