australian Stockstill



How It Works




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How It Works

The Stockstill Animal Restrainer consists of a main unit which produces minute electrical pulses, electrodes which pass those pulses through an animal, and various leads and connections.

Power is supplied by a six-volt dry cell battery with spring terminals.  The unit works on the principle of passing very short-duration pulses through an animal along the spinal region, producing contractions of the skeletal muscles which render all or part of the animal immobile (depending on placement of the electrodes).  These characteristics make the Stockstill particularly suitable for operations such as castration, de-horning, speying, foot trimming, ear-tagging, assisted calving and branding of all medium/large farm animals.  When the current is switched off and the electrodes removed, animals generally are quiet, they show no unfavourable reaction and they may exhibit a degree of docility for five to ten minutes after release.

Scientific examinations and trials of the unit have concluded that use of the Stockstill causes little, if any, discomfort or adverse reactions to the animal and, of course, it leaves no chemical residue.

It is important to understand that the animals are in no way being harmed by the use of the low-voltage current in the unit, even at maximum output.  The power produced by the unit is less than one-twentieth of that used to power a small pencil-type torch bulb.

Tests of stress (measuring blood cortisol levels) show results similar to those recorded by most animals under conditions of yarding and handling, and several times less than those produced by animals subjected to painful operations.  Frequently handled animals show almost no adverse reaction to the restraining procedure.

However, Stockstill must not be used to allow unauthorised acts of surgery to be performed.  Such acts may lead to an operator being prosecuted under animal welfare legislation.  Please read the Legislation page for more information.