Mechanical restraining methods

Transcription

1 Mechanical restraining methods For the use of slaughter methods without stunning, each animal must be individually restrained before cutting the throat (Art of the Regulation). Restraining the animal enables to cut its throat rapidly and precisely. As a result, the animal will bleed and die more quickly. In case the animal is stunned before or after cutting its throat, restraining facilitates stunning as well. It is also safer for the slaughtermen. a poorly restrained animal will struggle. Cutting and bleeding will be difficult. It will also be more painful for the animal, and could be dangerous for the slaughtermen. Some restraining methods are allowed by the Regulation while others are explicitly forbidden. A conscious bovine should not be restrained under any circumstance by: suspending or hoisting it clamping or tying its legs or feet severing its spinal cord immobilising it with an electric shock These practices are unacceptable and forbidden. The Regulation requires that bovines shall be mechanically restrained. Mechanical restraining systems include: Standing systems The animal is restrained in a standing position. Rotating systems The animal is restrained by rotating until it is tilted sideways or lies on its back. All standing and rotating systems for bovines should: Restrict lateral and vertical movement of the head Be adjustable to the size of the animal All mechanical restraint methods cause stress. The level of stress varies as a result of a number of factors: the state of the animal, the breed, previous mixing with other animals and any fighting that might have ensued, and also handling immediately prior to entering. Therefore, efforts and measures are essential to reduce stress caused by mechanical restraint systems. Mechanical restraining systems should also cause no injury and minimum discomfort. Because restraining causes stress, the Regulation requires that restraint starts only after verification that the cut can be performed without any delay. The following methods are used under commercial conditions in the European Union. 1. Standing systems individual box An individual box (pictured) may be used to restrain the animal before it is killed. The animal is in a standing position for slaughter. The animal may enter the box at the end of a ramp or corridor. There should be no need to push or prod the animal. Instead, the animal should enter the box willingly. Animals will not enter willingly if: It is dark there should be light in the box. It is noisy noise around the box should be limited. The floor looks suddenly different a false floor similar to the box s floor can be installed 1.5m before the entrance. It looks like a dead end empty space can be left beyond the box and is visible from the entrance. May

2 There are reflections the box should not have reflective material. The entrance is too small for the animal to come through easily the door should be designed for the category of animals it is used for. The operator is visible at the other end the operator should wait on the side until the animal has been restrained. The head can be lifted with a chin-lift (pictured). The chin lift can be raised manually, electrically, or using chains until the head is parallel to the floor. The chin-lift supports the head. It stretches also the neck for the cutting. Once the animal s head is restrained, the back pusher can be released. The box should have solid walls and an opening for the animal s head. The animal enters the box and put its head out of the box, on the other side. Various pushers (depending on the box s design) can be activated to restrain the animal: back pusher, side pusher, and belly support. The belly support ensures that the animal does not collapse after neck cutting. The animal will struggle if the pressure applied is excessive. After using the pushers, the head can be restrained. There, the head should be restrained. The neck can be immobilised with a neck-yoke or head-yoke. (pictured) Advantages The animal cannot move forward or backward. The head is stabilised for neck cut. Operators are protected from the animal s movements. The animal cannot fall. The animal is in a natural, standing position for slaughter. Carotid ballooning/welling on cut arteries can occur. It can be more easily resolved if the animal is in a standing position. May

3 Disadvantages There is a cost to the purchase of upright boxes. However, standing systems are cheaper than rotating systems. The box requires some handling of the animal. Cutting in this position requires more skilled operator. The box can only be used for low speed slaughter. This restraining system constitutes good practice. 2. Standing system Conveyor belt Conveyor belt systems restrain animals progressively as they move forward into a corridor and into a chute. Animals should be moved quietly and calmly into the restrainer. They will thus arrive at the point of cutting or stunning as calm and relaxed as possible. Animals can be moved to the foot of the restrainer as a group, or individually. The former is preferable: animals are less anxious when not separated from the group. Different kinds of conveyor systems exist: V-shape restrainer A V-shape moving restrainer consists of two conveyor belts that are set in a V shape. The animal is held between each belt. The belts support and press on the animal at the same time. Central track restrainer A central track restrainer (pictured) supports the animal belly, between two vertical solid slides or rails. As animals move down into the chute, a smooth track passes between their legs and supports their weight. They are carried gently on the central conveyor. As the conveyor takes them forward, slides are adjusted to press on each side of the body. Conveyor systems include a solid hold down rack to ensure that animals cannot see in front of them until they are fully restrained. This helps keeping animals calm. The conveyor brings the animal to the point of slaughter. There, the head should be restrained. The neck can be immobilised with a neck-yoke or headyoke. The head can be lifted with a chin-lift. The chin lift can be raised manually, electrically, or using chains until the head is parallel to the floor. The chin-lift supports the head. It stretches also the neck for the cutting. May

4 The head restraint should not obscure the front of the head and allow good access to the eyes. This enables verification of consciousness after the neck has been cut. Advantages Animals are more comfortable in conveyor belt restrainers than in static restrainers. Conveyor belt systems require little handling of the animals. They are safer for workers than boxes or rotating pens. Conveyor belt systems require only short restraint until neck cutting. Small animals can be loaded as a group into a conveyor system. This is less stressful for the animal than individual loading. The animal cannot move forward or backward. The head is stabilised for neck cut. Operators are protected from the animal s movements. Carotid ballooning/welling on cut arteries can occur. It can be more easily resolved if the animal is in a standing position. Disadvantages Small animals could risk injuries from falling through a V-shaped system. Cutting in this position requires more skilled operator. There is a cost to the purchase and maintenance of conveyor belts that is higher than for static systems. This restraining system constitutes good practice. 3. Rotating pens A rotating pen (pictured) may be used to restrain the animal. Rotating pens allow moving the animal on its side (up to 90 rotating pens), or on its back (180 rotating pens) before cutting. Rotating pens that turn the animal upside down (180 ) may be forbidden due to stricter national rules. The animal is loaded into the pen in the same way as for a standing individual box (above). Pens should have adjustable side panels and backrest to ensure full support to the animal during rotation; and to prevent the animal from slipping, twisting, or falling during inversion. The animal s head must be restrained before rotating. The neck can be immobilised with a neck-yoke or headyoke. The head can be lifted with a chinlift. The chin lift can be raised manually, electrically, or using chains until the head is lateral to the floor. The chin-lift supports the head. It stretches also the neck for the cutting. Rotation should be smooth and any sudden movements or unnecessary interruptions should be avoided. It should take no longer than 30 seconds to fully rotate the animal. The pen should be easily evacuated in case of stoppage of emergency. May

5 Advantages Rotating pens can facilitate cutting through better exposure of the neck. Innovative versions of rotating pens enable restraining of two animals at a time, thus speeding up the slaughtering process. The animal cannot move forward or backward. The head is stabilised for neck cut. Operators are protected from the animal s movements. The animal cannot fall. abattoirs with a high output of slaughtered animals per year. Carotid ballooning/welling on cut arteries can occur. It is difficult to prevent and to resolve if the animal is not standing. Some of these devices do not turn fast enough. As a result the time from restraint to cutting can be excessive. This restraining method constitutes acceptable practice in most European Union Member States. Disadvantages Rotating system affect the comfort of animals, as they are restrained in an unnatural position. The discomfort is greater if the animal is rotated upside down (180 ) than laterally (90 ). Rotating systems are more expensive to purchase than standing systems. Rotating pens with double restraining devices are best suited to large Control procedure for all mechanical restraining systems What should be checked? What does good look like? What might go wrong? How can it be fixed? Entrance into the system No balking Animal enters voluntarily into the system Animal does not require prodding to move forward into the system Use of electric goads should be avoided as far as possible (less than 20% of the animals) Distractions Block view of killing and shackling area before entry into the system, or leave space beyond the box to create impression of passing through ; The slaughterman should not be visible at the other end Injuries or contusions causing problems when moving the animals Reflections Surface of the system should be dark and nonreflective System door Door should not be too short or too narrow Change of flooring False floor similar to system floor 1.5m before May

6 What should be checked? What does good look like? What might go wrong? How can it be fixed? entrance No lighting in the system / animal entering from light into darkness provide diffuse light in the system Animal stress during entrance into the system Less than 10% of animals vocalize. Animal experience during transport and unloading Operator behaviour If more than 20% vocalize during entrance, this should trigger immediate corrective action. Time to introduce the animal into the system To be monitored by the animal welfare officer as a function of animals and operators. Too short a time might indicate excessive pressure being imposed on animals (goading). Too long a time might indicate obstacles or distractions Optimal pressure of restraining systems Absence of struggling behaviour and vocalization during restraint: less than 5% of animals vocalise while entering the restraining system or while being restrained Absence of injuries and bruises caused by restraining In case of standing systems, the belly support does not lift the animal from the floor The restraining system presses excessively against the animal and causes discomfort. All mechanized parts that press against the animal should be equipped with pressure limiting devices that automatically prevent excessive pressure from being applied on the animal. If more than 10% of animals vocalize while restrained this should trigger immediate corrective action. Ventral opening of the neck restraint can sometimes press on neck impeding blood loss: Action to ensure no physical pressure on cut arteries Smooth surfaces The parts of the restraining equipment that enter into contact with the animal have smooth, rounded surfaces Surfaces should be inspected at least daily; parts that could harm the animal are replaced promptly If belly lift, back push or chin lifts are used animals can be stressed. These devices should operate May

7 What should be checked? What does good look like? What might go wrong? How can it be fixed? smoothly to prevent stress. Movements of the head/neck The neck should be restrained A chin lift can also be used to extend and restrain the head for neck cutting. Incorrect restraining of the head Deficient neck-yoke / head-yoke / chin-lift Hyperextension of the neck adjustments may be required for different categories of animals. Lack of experience / training The operator should observe easily and thoroughly the animal s responses. The operator performing the cut may communicate with the operator restraining the head to prevent incidents. Animal slips and falls No slips and falls Floor in the box entry or in the box may be slippery Put non-slip flooring in the box Movement of the box Smooth No slamming For rotating systems: it takes on average 15 seconds (and, in any case, no more than 30 seconds) to fully rotate the animal Equipment problem repair, revise, maintain Operator skills Train operators to improve their skills. Trapped neck/body Effective application of back push plate Failure to push small animals Improve restraining practices May