Lesson Notes By Weeks and Term v4 - SHS 1

Lesson Video

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Performance objectives

• Identify key animal husbandry practices.
• Demonstrate basic skills in managing farm animals.
• Explain the importance of animal welfare.
• Recognize common tools and their uses.

Lesson summary

This lesson introduces the essential hands-on skills required for successfully raising farm animals. In Ghana, livestock like goats, sheep, and poultry are not just sources of food (meat, eggs, milk) but are also crucial for income generation, cultural ceremonies, and providing manure for crop farms. Proper management ensures that these animals are healthy, productive, and profitable. By learning these practices, students gain practical skills that can be applied in backyard farms, commercial enterprises, and contribute to national food security. This lesson moves beyond theory to focus on the 'how-to' of animal care.

Lesson notes

Animal husbandry or management practices are the routine activities a farmer performs to ensure the health, growth, and productivity of farm animals. Let's explore some of the most critical ones in detail. A. Animal Identification Definition: This is the practice of putting permanent or semi-permanent marks on an animal to establish its identity and ownership. Importance: Ownership: Prevents theft and helps in recovering lost or strayed animals. Record Keeping: Allows farmers to keep accurate records of individual animals for breeding, health treatments, and performance (e.g., milk yield, weight gain). Management: Helps in separating animals for culling (removing unproductive ones), breeding, or treatment. Common Methods, Tools, and Procedures: Ear Tagging: Tools: Ear tags (plastic or metal), Tag applicator (looks like a pair of pliers). Procedure: Securely restrain the animal (e.g., a goat or calf) to prevent injury to it and yourself. Clean the ear tag and the applicator with a disinfectant (like methylated spirit) to prevent infection. Select a suitable spot on the ear, avoiding major blood vessels. The best place is usually in the middle third of the ear, between the cartilage ribs. Place the male part of the tag on one jaw of the applicator and the female part on the other. Position the applicator over the ear and squeeze firmly and quickly. You will hear a 'click' sound. Release the applicator. The tag should be securely fastened. Check for any bleeding and apply an antiseptic if necessary. Ear Notching: Tools: Ear notcher (a special V-shaped punch), disinfectant. Procedure: Specific V-shaped or U-shaped cuts are made at different locations on the ear. The position and number of notches represent a specific number, allowing for unique identification. This is common in pigs. Branding: Tools: Branding irons, source of heat (for hot branding) or liquid nitrogen/dry ice (for freeze branding). Procedure (Hot Branding): Restrain the animal (usually cattle) in a crush or chute. Heat the branding iron until it is reddish-hot (ashy grey colour). Press the hot iron firmly onto the animal's hide (usually the flank or rump) for 3-5 seconds. The aim is to burn the hair follicles to leave a permanent scar, not to burn deep into the flesh. Animal Welfare Note: All identification methods cause some temporary pain. It is crucial to be quick, use clean tools, and restrain the animal properly to minimise stress and risk of infection. B. Castration Definition: The removal or destruction of the testicles of a male animal. Importance: Controls Breeding: Prevents uncontrolled mating and breeding of inferior or related animals. Improves Meat Quality: Castrated animals tend to be fatter and produce more tender meat with less 'male' odour (boar taint). Makes Animals Docile: Reduces aggression, making males easier and safer to handle. Common Method, Tools, and Procedure (Burdizzo Method): Tools: Burdizzo (a large, clamp-like tool), disinfectant. This is a bloodless method. Procedure: Restrain the Animal: Secure the young male animal (e.g., kid, lamb, or calf) firmly. An assistant should hold it steady. Locate the Spermatic Cord: Use your fingers to manipulate the scrotum and isolate one spermatic cord to the side of the scrotum. The spermatic cord feels like a hard piece of wire. Position the Burdizzo: Place the jaws of the burdizzo over the cord, ensuring the testicle is below the jaws. Make sure you are only clamping one cord at a time and not the central dividing membrane of the scrotum. Clamp Firmly: Close the burdizzo handles tightly and hold for about 5-10 seconds. You should hear a 'crunching' sound. This crushes the spermatic cord and the blood vessels leading to the testicle. Repeat on the Other Side: Release the burdizzo, shift it slightly lower (about 1-2 cm) on the scrotum, and repeat the process on the second spermatic cord. Crucially, do not clamp across the entire scrotum at once, as this can cut off blood supply to the scrotum itself, causing tissue death. Check: After a few weeks, the testicles will shrink and atrophy (waste away). Animal Welfare Note: This procedure should be done when the animal is very young to minimise pain and stress. Ensure the equipment is clean and in good working order. C. Dehorning and Disbudding Definition: Disbudding: Destroying the horn buds in very young animals (e.g., calves, kids) before they grow into horns. Dehorning: Removing the fully grown horns from an adult animal. Importance: Safety: Horned animals can injure other animals and farmworkers. Space Management: Dehorned animals require less space at feeding troughs and during transportation. Prevents Carcass Damage: Reduces bruising on carcasses when animals fight, which improves meat quality and value. Common Method (Disbudding with a Hot Iron): Tools: Electric dehorner or hot iron, restraining box/chute, gloves. Procedure: Restrain the young animal (ideally 2-4 weeks old) securely. Clip the hair around the small horn buds to expose them. Heat the dehorning iron until it is red hot. Place the hot, hollow end of the iron over the horn bud and press down firmly. Rotate the iron for about 10-15 seconds until a complete copper-coloured ring is formed around the base of the bud. This cauterises the blood vessels and destroys the horn-producing cells. The horn bud will eventually fall off. Animal Welfare Note: Disbudding is preferred over dehorning as it is less painful and has fewer complications. It must be done at a very young age.

Guided Practice (With Solutions)

Here are some questions to check our understanding of the concepts. We will discuss the answers together.

Question 1: A farmer in the Ashanti Region has just bought 20 young West African Dwarf goats. He wants to keep track of each one for vaccination and breeding purposes. Which management practice should he perform first, and what tool would be most suitable? Solution: Practice: He should perform Animal Identification. Tool: The most suitable and common tool for goats would be ear tags and a tag applicator. It is relatively cheap, easy to apply, and allows for individual numbers to be placed on each animal, which is perfect for record keeping. Commentary: This question connects a real-world scenario (a Ghanaian farmer with a specific breed of goat) to the core concepts. Ear tagging is the most practical solution compared to branding (too harsh for goats) or ear notching (can be confusing without a standard system).

Evaluation guide

• Apply the skills in farm animal management practices for rearing animals.
• Collaborative learning: The teacher puts learners in mixed -ability/mixed -
• gender groups (where appropriate) to disc uss the various animal husbandry
• practices and the tools used for performing those activities. Learners with