Abstract: The neutralizing system comprises a low impedance current transformer for detecting an alternating stray current flowing through a ground return circuit in the proximity of an animal susceptible to be subjected to this stray current and the corresponding alternating stray voltage. The current transformer has a 1:1 primary-to-secondary transformation ratio. The neutralizing device further comprises a chain of amplification responsive to the alternating stray current detected by the current transformer to produce an alternating compensating current having an amplitude and phase respectively related to the amplitude and phase of the detected alternating stray current. Finally, a magnetic coupling circuit magnetically couples the alternating compensating current to the ground return circuit in view of inducing in that ground return circuit an alternating compensating voltage adding to the alternating stray voltage to substantially cancel this stray voltage and, a consequence the stray current.