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The Slaughter of Animals

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(1)

The Slaughter of

Animals

(2)

The methods used to slaughter animals can affect carcass and meat

quality, the animals’ welfare and the safety of the personnel operating

the system.

Many methods are influenced by

religious beliefs.

(3)

1. Handling and Ante-mortem Inspection

Animals must inspected before they are

slaughtered.

Antemortem examination should be done within 24

hours of slaughter and

repeated if slaughter has

been delayed over a day.

(4)

Some symptoms of disease, such as in tetanus, rabies or poisoning, may be more obvious in a live animal than in the carcass.

It is important to detect some serious diseases at

the earliest opportunity to prevent further infection

and contamination.

(5)

To screen all animals destined to slaughter.

To ensure that animals are properly rested and that proper clinical information is obtained.

To reduce contamination by separating the dirty animals and condemning the diseased animals

To ensure that injured animals or those with pain and suffering receive emergency slaughter and that animals are

treated humanely.

To identify reportable animal diseases

To identify sick animals and those treated with antibiotics, chemotherapeutic agents, insecticides and pesticides.

Major

objectives

(6)

• Antemortem inspection should be carried out in adequate lighting where the animals can be observed both collectively and individually at rest and motion.

• The general behaviour of animals should be

observed, as well as their nutritional status,

cleanliness, signs of diseases and abnormalities.

(7)

Abnormal Respiratio

n

Discharge s

Posture

Structure

Gait

Behavio ur

Odour

Color

(8)

Respiration

• Frequency of respiration

• If the breathing pattern is

different from normal the animal should be segregated as a suspect

Behaviour

• walking in circles or show an

abnormal gait or posture

• pushing its head against a wall

• charging at

various objects and acting

aggressively

• showing a dull and anxious expression in the eyes

Gait

• associated with pain in the legs, chest or

abdomen or is

an indication of

nervous disease

(9)

• Swellings (abscesses)

• Enlarged joints

• Umbilical swelling

• Mastitis

Structure

• Tucked up abdomen or the animal may stand with an extended head and stretched out feet.

• The animal may also be laying and have its head turned along its side.

Posture

• From the nose, excessive saliva from the mouth

• Protruding the rectum or vagina

• Growths on the eye

• Bloody diarrhoea

Discharges

(10)

Odour

 Difficult to detect on routine

examination.

 An abscess

 A medicinal odour

 Stinkweed odour

 An acetone odour of ketosis may be observed.

Color

 Such as black areas on horses and

swine

 Red areas on light coloured skin

(inflammation),

 Dark blue areas on

the skin or udder

(gangrene)

(11)

2. Stunning

• Particularly with large animals, stunning is important to immobilize the animal to facilitate severing the blood vessels (sticking) to kill it.

• Persons carrying out stunning should be properly trained and competent

Preventing the animal feeling pain or distress at exsanguination

Some stunning techniques may also benefit carcass

quality

(12)

There are different ways in which animals can be stunned.

Stunning

Mechanical instrument

Electrical current

Anaesthetic

gas

(13)

• It is important that the animal is sufficiently restrained to allow accurate shooting or application of the electrical current.

• This is another reason for ensuring that the animal is not distressed or fractious at the point of stunning.

In the case of pigs, sheep and goats, the animal may be held in a V-shaped or monorail-type restraining conveyor,

For cattle a restrainer can

also be used but it is more common to confine the animal in

a stunning box.

(14)

Mechanical Stunning

• Captive bolt pistol, percussion stunner or free bullet which traumatizes the brain so that the animal loses consciousness instantaneously.

These methods developed from

use of the pole-axe, was replaced

by a small-headed sledge hammer

(15)

 To stun an animal it is not necessary to penetrate the brain.

 Concussion stunning, alone can be effective and some equipment is designed to give a non-

penetrating blow to the head.

• Concussion stunning is best restricted to mature

cattle since it relies on a reasonable thickness of

bone over the brain. This is because it is important

that the bone does not break

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