Pig routine management requires careful identification of individual animals to ensure accurate record keeping, health monitoring, breeding management, and traceability. In Kenya’s pig production sector, where farms range from smallholder units to commercial enterprises, reliable identification methods facilitate effective management and enhance productivity. Proper identification also supports disease control efforts by enabling quick intervention for affected animals. This chapter focuses on the various pig identification methods used in Kenyan pig farms and their practical application.

5.1 Pig identification methods

Identification of pigs is a foundational practice in pig production management. It enables farmers to keep individual records for health, growth, breeding, and treatment history. In Kenya, where pig farming contributes to livelihoods and food security, choosing the right identification method depends on farm size, budget, and the purpose of identification. This section explores the main identification methods, their advantages, limitations, and considerations for implementation.

5.1.1 Ear Tagging: Types and Application

Ear tagging is one of the most common methods of pig identification in Kenya due to its cost-effectiveness and ease of use. It involves attaching a plastic or metal tag to the pig’s ear, which carries a unique identification number or code visible from a distance.

Types of Ear Tags

• Plastic Ear Tags: These are lightweight, brightly colored, and usually printed with numbers or barcodes. They are less painful to apply and commonly used in commercial pig farms and cooperatives.
• Metal Ear Tags: Made of aluminum or stainless steel, these are more durable but heavier and may cause discomfort. They are preferred in situations requiring long-term identification, such as breeding stock in university farms.
• Electronic Ear Tags: Embedded with microchips, these tags enable electronic scanning and data retrieval. Their use is growing in large-scale farms and research institutions for precise tracking but remains costly for most smallholder farmers.
• Self-Piercing Tags: These tags have a sharp pin that pierces the ear when applied, simplifying the tagging process and reducing handling time.

Application and Maintenance

• Tags should be applied on the outer edge of the ear cartilage to avoid tearing.
• The correct size tag must be selected to prevent loss or injury.
• Tags require regular inspection to ensure they remain legible and firmly attached.
• Lost or damaged tags must be replaced promptly to maintain accurate records.
• Proper sterilization of tagging tools reduces the risk of infection at the tagging site.

5.1.2 Ear Notching: Technique and Identification Coding

Ear notching is a traditional method involving cutting small notches or V-shaped marks on the pig’s ear edges. It is widely used by small-scale farmers and pig breeders in Kenya for its low cost and permanence.

Technique of Ear Notching

• The pig’s ear is held firmly, and notches are made on the ear margins using a specialized notching tool.
• Each notch corresponds to a number based on a standardized coding system.
• The right ear usually represents the piglet’s individual number, while the left ear indicates the litter number.
• Care must be taken to avoid excessive damage that could affect the pig’s hearing or cause infection.
• Notching is typically done within the first week after birth when piglets are still small and manageable.

Identification Coding System

• The system uses a series of notches to represent numbers 1, 3, 9, 27, and 81, combined to form unique identifiers.
• For example, a notch representing 9 and another representing 1 on the right ear would identify pig number 10.
• This coding allows quick visual identification without the need for tags or electronic devices.
• Farmers must be trained to read and interpret the notches accurately to avoid errors.
• Ear notching is permanent and does not require replacement, which suits low-input farming systems.

5.1.3 Tattooing: Method and Durability

Tattooing involves marking the pig’s skin, usually inside the ear or on the flank, with permanent ink to display a unique identification number. This method is common in research stations, breeding farms, and some commercial units in Kenya.

Tattooing Method

• The pig is restrained, and the tattoo pliers with numbered punches are pressed into the skin to puncture and deposit ink.
• The tattoo is applied to the inner surface of the ear where the skin is thin and visible.
• Ink is rubbed into the punctures to enhance visibility.
• The process requires skill to avoid excessive pain and ensure clear, legible marks.
• Tattooing is usually done at weaning age to minimize stress on young piglets.

Durability and Limitations

• Tattoos are permanent and do not fade easily, allowing lifelong identification.
• However, the visibility of the tattoo may diminish if the ear skin thickens or gets dirty.
• Regular cleaning of the tattoo site is necessary to maintain legibility.
• This method is less visible at a distance compared to ear tags and requires close inspection.
• Tattooing equipment and ink must be sterilized to prevent infections.

5.1.4 Branding and Electronic Identification

Branding and electronic identification are specialized methods suitable for large-scale or high-value pig enterprises in Kenya. They provide permanent and reliable identification but involve higher costs and technical expertise.

Hot and Freeze Branding

• Hot branding uses a heated iron to burn a mark on the pig’s skin, while freeze branding uses liquid nitrogen to destroy pigment cells.
• Branding is permanent and visible from a distance but can cause pain and stress to the animal.
• It is rarely used in smallholder systems due to welfare concerns and the risk of injury.
• Proper aftercare is essential to prevent infection and promote healing.
• Branding is more common in breeding boars or sows where permanent identification is critical.

Electronic Identification

• Electronic Identification (EID) involves implanting microchips under the pig’s skin, usually in the neck area.
• The microchip stores a unique code readable by a scanner, enabling precise data management.
• EID supports traceability, disease control, and genetic improvement programs.
• The initial cost and need for scanning equipment limit its use to commercial farms and government programs.
• Implantation must be performed by trained personnel to avoid complications.

Chapter Summary

This chapter covers essential routine management practices in pig production aimed at promoting health and productivity. It begins with various pig identification methods that facilitate individual tracking and record-keeping. Grooming performance is discussed as a necessary activity to maintain the pigs' physical condition and comfort. Hygiene and sanitation practices are emphasized for preventing disease and ensuring a clean environment. The chapter explains culling as a strategy to remove unproductive or unhealthy animals from the herd. Control measures for internal and external parasites highlight the importance of regular treatment to safeguard pig health. Isolation and quarantine procedures are outlined to prevent the introduction and spread of infectious diseases. The provision of clean water ad-libitum is stressed as critical for hydration and overall well-being. Finally, the chapter addresses the preparation of accurate farm records and the implementation of bio-security practices including sterilization to protect the piggery from contamination and disease outbreaks.