This consists in cutting the tendon of the peroneus muscle.
"Common Diseases of Farm Animals"
R. A. Craig, D. V. M.
The flexors of the toes, the tibialis posterior, and the peroneus longus are shortened to a less degree.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
In severe cases it may be necessary to lengthen the contracted tendons-the extensor digitorum, the extensor hallucis, and, it may be also, the peroneus tertius and tibialis anterior; the tendo Achillis may require to be shortened.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson