Course Content
UNIT 1 – INTRODUCTION TO DAIRY CATTLE PRODUCTION
After successful completion of unit one, students will able to:  Define and use correctly key terminologies related to dairy production and the dairy industry.  Describe the role of dairy production in the world economy and identify major features of the dairy industry.  Discuss the potentials and constraints of dairy production and development in Ethiopia, showing an appreciation for its socio-economic impact.  Classify and compare different dairy cattle production systems found in the tropics.  Explain and evaluate the advantages and disadvantages of keeping dairy cattle under various production systems.
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Unit objectives
1.1. Overview of Dairy Production in the World Economy
1.2. Features of the Dairy Industry
1.3. Dairy Production and Development in Ethiopia: Potential and Constraints
1.4. Dairy Cattle Production Systems
1.5. Advantages and Disadvantages of Dairy Farming
Activity 1: Group Discussion Questions
UNIT 2 – BREEDS OF DAIRY CATTLE AND DISTRIBUTION
In unit two, you will be introduced to the diversity of dairy cattle breeds and their distribution, with a focus on both exotic and indigenous breeds. You will begin by exploring the fundamental reasons why animals, particularly cattle, differ from one another, examining distinctive characteristics such as body conformation, fitness traits related to adaptability and disease resistance, and production traits tied to milk yield and quality. This foundational understanding will then guide you into the classification of dairy cattle breeds into local (Bos indicus) and exotic (Bos taurus) types, highlighting how their unique features determine their suitability to various environments and management systems. Following this, you will delve into detailed profiles of the most well-known exotic dairy cattle breeds, including Holstein Friesian, Ayrshire, Jersey, Guernsey, and Brown Swiss, learning about their origins, physical features, milk production capacities, and adaptability. You will also examine these breeds through illustrative figures that help visualize their typical appearances. The unit will then shift to the rich diversity of Ethiopian indigenous dairy cattle breeds, such as Barca, Arsi, Fogera, Boran, Horro, Ogaden, Sheko, and Senga. You will learn how these breeds have evolved under local conditions to provide milk, meat, and draft power, while maintaining resilience to Ethiopia’s varied climates and disease challenges. Pictures included throughout will help you recognize these breeds in practice. By the end of this unit, you will not only have a clear appreciation of the breeds commonly used for dairy production both globally and in Ethiopia, but also understand why the right breed choice matters for achieving sustainable dairy development under different production systems.
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Introduction
Unit Objectives
Self-Assessment Question 1
2.1. Breeds of Dairy Cattle
2.2. Exotic Dairy Cattle Breeds
2.2.1. Holstein Friesian
2.2.2. Ayrshire
2.2.3. Jersey
2.2.4. Guernsey
2.2.5. Brown Swiss
2.3. Indigenous Cattle breeds
2.3.1. Barca
2.3.2. Arsi
2.3.3. Fogera
2.3.4. Borana
2.3.5 Horro
2.3.6 Ogaden
2.3.7 Sheko
2.3.8. Senga
Summary of Unit 2
Group Discussion Questions
UNIT 3 – DAIRY CATTLE HOUSING AND MANAGEMENT
In unit three, students will acquaint themselves with the dairy cattle housing importance, types of dairy cattle houses, and management of dairy cattle at different physiological stages. The importance of dairy cattle houses and types of dairy houses will be covered in the first section of the unit. Next to this section, students will learn about the management of different groups of animals in dairy cattle production.
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Objectives
3.1. The importance of Dairy Cattle housing
3.2. Site Selection & Farm Layout for Dairy Cattle Housing
Activity: Visit a nearby dairy farm house
3.3. Types of Housing and Housing Equipment
3.3.1. Loose house system
3.3.2. Conventional dairy barn
3.3.2.1. Dairy Cattle Housing Orientation
3.3.2.2.The advantages of arrangement
3.4. Dairy Cattle Management
3.4.1 Pregnant Cows
3.4.2. Lactating Cow
3.4.3. Dry Cow
3.4.4. Calves
3.4.5. Heifers
3.4.6. Breeding Bulls
Unit Summary
Self-Assessment Questions
Further Reading
UNIT 4 – REPRODUCTION AND BREEDING OF DAIRY CATTLE
In unit four, you will explore the vital biological and management aspects that underpin the reproductive efficiency and genetic improvement of dairy herds. You will understand the reproductive system of dairy cattle and the dynamics of the oestrus cycle, which are essential for making informed breeding decisions and ensuring high conception rates. You will also examine how to select appropriate dairy breeds, discuss key economically important traits that influence milk production and herd profitability, and study various selection methods that help achieve desirable genetic progress. Additionally, you will learn about the different methods of impregnation, including natural mating using bulls and the widespread use of artificial insemination (AI), which plays a critical role in modern dairy herd management. By the end of this chapter, you will appreciate how reproduction and breeding practices contribute to herd productivity, animal welfare, and the overall success of dairy enterprises. This knowledge will be fundamental for designing effective breeding programs, improving herd genetics, and supporting sustainable dairy production.
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Unit 4. Introduction
OBJECTIVES
4.1. Reproductive System of Dairy Cattle
4.1.1. Female Reproductive System
4.1.2. Male Reproductive System
4.2. The Oestrus Cycle of the Cow
4.3. Selection of Dairy Cattle Breeds
4.3.1. Selection methods of dairy animals
4.3.2. Economically important traits
4.4. Methods of Impregnation
4.4.1. Artificial Insemination (A.I.)
4.4.2. Natural Service
SUMMARY
Activity 4: Group 1
Activity 4: Group 2
Activity 4: Group 3
Activity 4: Group 4
Activity 4: Group 5
Self-Assessment Question 4.
Self-Assessment Question - II
FURTHER READING MATERIALS
UNIT 5 – FEEDS AND FEEDING OF DAIRY CATTLE
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Unit 5. Introduction
Unit 5 Objectives
5.1. Digestive System of Dairy Cattle
5.1.1. Ruminants and their stomach
5.1.2. Gastrointestinal Tract Adaptations
5.1.3. Structure and Function of the Stomach
5.1.4. Development of the Stomach
5.2. Rumination Process
5.3. Feed Resources of Dairy Cattle
5.3.1. Natural Pasture
5.3.2. Crop Resides
5.3.3. Agro-industrial Byproducts
5.3.4. Cultivated Forages
5.3.5. Non-conventional Feeds
5.4. Feeding Dairy Cattle
5.4.1. Feeding According to Stage
5.4.2. Practical Considerations
5.4.3. Nutrient Requirement of Dairy Cattle
5.4.4. Ration formulation for dairy cattle
5.4.5. Feeding strategies of dairy cattle
5.5. Feeding related problems in dairy cattle
Summary
Activity 5: Group Discussion Questions
Self-Assessment Question (True or Flase)
Self-Assessment Question (Explain in brief)
Self-Assessment Question (Fill in the blank space)
Further Reading Materials
UNIT 6 – ANATOMY AND PHYSIOLOGY OF LACTATION
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Unit Introduction
Unit Objectives
6.1. Mammary Gland Development
6.2. Embryonic and Fetal Development
6.3. Development from Birth to Puberty
6.4. Developments of Pregnancy
6.5. Lactogenesis
6.6. Milk Synthesis and Secretion
6.7. Milk Let Down and Hormonal Regulation
6.8. Factors Affecting Milk Yield and Milk Composition
6.8.1. Genetic Factor
6.8.2. Environmental Factor
Unit Summary
Self-Assessment Questions (Fill in the blank space)
Self-Assessment Questions (explain briefly)
Further reading Materials
UNIT 7 – DAIRY HERD HEALTH CARE
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Unit Introduction
Unit Objectives
7.1. Disease Prevention and Health Control: Regular Observation
7.2. Forms and Causes of Diseases
7.3. Common Dairy Cow Diseases and Disorders
7.3.1. Internal Diseases
7.3.2. External Parasites
7.4. Disposal of a Dead Animal
7.4.1. Common Methods of Disposal
7.4.2. Important Considerations
7.5. Dairy Cattle Welfare and Handling
7.5.1. Importance of Dairy Cattle Welfare
7.5.2. Proper Handling Techniques
7.5.3. Key Aspects of Dairy Cattle Welfare
Unit Summary
Self-Assessment Questions (Tre/False)
Self-Assessment Question (Choise)
Self-Assessment Questions (fill in the blank)
Further reading Materials
UNIT 8 – IDENTIFICATION AND RECORD KEEPING
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Unit Introduction
Unit Objectives
8.1. Purpose and Benefits of Records Keeping
8.2. Identification Methods
8.3. Dairy Herd Recording and Management
Unit Summary
Self-Assessment Questions (Fill in the blank space)
Self-Assessment Questions (Provide short answer)
FURTHER READING MATERIAL
UNIT 9 – SUSTAINABLE DAIRY PRODUCTION AND ENVIRONMENT
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Unit Introduction
Unit Objectives
9.1. Greenhouse Gas Emissions from Dairy Cattle Production
9.2. Methods for Calculating Emissions from Livestock
9.2.1. Direct Methods
9.2.2. Indirect Methods
9.3. Methods of Reducing Greenhouse Gas Emission
9.4. Sustainability and Resilience of the Dairy Sector in Changing World
Unit Summary
Self-Assessment Questions (Choise)
Self-Assessment Questions (Explain briefly)
Further Reading Materials
Dairy Cattle Production and Management

7.3.1. Internal Diseases

Internal diseases affect the animal’s internal organs, metabolism, or overall health system. These diseases can cause decreased milk production, poor reproductive performance, weight loss, and sometimes death. Common internal diseases in dairy cattle include:

1. Mastitis

  • Cause: Bacterial infection, commonly by Staphylococcus and Streptococcus species.
  • Symptoms: Swollen, hot, and painful udder; abnormal milk with clots or watery consistency; reduced milk yield.
  • Prevention: Maintain good milking hygiene; use teat dipping before and after milking; ensure proper milking technique; keep the environment clean and dry.
  • Control: Early detection; antibiotic treatment as prescribed; dry cow therapy during the non-lactating period; cull chronically infected animals.

2. Foot and Mouth Disease (FMD)

  • Cause: Viral infection by Aphthovirus.
  • Symptoms: Fever; blisters and ulcers on mouth, tongue, teats, and feet; lameness; excessive salivation; reduced appetite and milk production.
  • Prevention: Vaccination programs; strict biosecurity measures; control animal movement and quarantine new animals.
  • Control: Quarantine affected animals; supportive care; restrict movement to prevent spread; disinfect premises.

3. Bovine Tuberculosis

  • Cause: Bacterial infection by Mycobacterium bovis.
  • Symptoms: Chronic cough; weight loss; poor body condition; intermittent fever.
  • Prevention: Regular herd testing; maintain strict biosecurity; avoid contact with wildlife reservoirs.
  • Control: Test and cull infected animals; sanitation of housing areas.

4. Milk Fever (Hypocalcemia)

  • Cause: Low blood calcium levels, usually around calving due to sudden calcium demand for milk production.
  • Symptoms: Weakness; muscle tremors; inability to stand; cold extremities.
  • Prevention: Balanced diet with proper calcium and magnesium before and after calving; avoid excess dietary calcium pre-calving to stimulate calcium metabolism.
  • Control: Intravenous calcium supplementation; supportive care.

5. Ketosis

  • Cause: Energy deficiency leading to high ketone bodies, often postpartum due to negative energy balance.
  • Symptoms: Reduced appetite; weight loss; decreased milk yield; sweet or acetone smell on breath.
  • Prevention: Provide adequate energy in the diet before and after calving; monitor body condition; prevent excessive fat mobilization.
  • Control: Administer glucose precursors like propylene glycol; veterinary intervention as needed.

6. Bloat

  • Cause: Gas accumulation in the rumen due to rapid fermentation of easily digestible feeds or sudden diet changes.
  • Symptoms: Swelling on left side of abdomen; discomfort; difficulty breathing; distress.
  • Prevention: Avoid sudden diet changes; provide adequate roughage; limit legume intake.
  • Control: Release gas by passing a stomach tube or trocar; anti-foaming agents; veterinary assistance if severe.

7. Internal Parasites (Worms)

  • Cause: Infestation by nematodes, flukes, tapeworms.
  • Symptoms: Poor growth; diarrhea; anemia; reduced milk production; dull coat.
  • Prevention: Pasture rotation; maintain hygiene; avoid overstocking.
  • Control: Regular deworming with appropriate anthelmintics; follow veterinary advice.

8. Brucellosis in Dairy Cows

  • Cause: Brucella abortus bacteria transmitted through contact with infected birth fluids or milk.
  • Symptoms: Abortion in late pregnancy, retained placenta, infertility, swollen joints, and reduced milk yield.
  • Prevention: Vaccinate heifers, use disease-free breeding stock, maintain hygiene during calving, and test regularly.
  • Control: Isolate and cull infected cows, dispose of aborted materials safely, and educate farm workers.

9. Anthrax in Dairy Cows

  • Cause: Bacillus anthracis spores from contaminated soil or water.
  • Symptoms: Sudden death, fever, swelling of neck/throat, & bleeding from body openings.
  • Prevention: Annual vaccination in risk areas, avoid contaminated pastures, and good farm hygiene.
  • Control: Report cases immediately, quarantine farms, burn or deeply bury carcasses with lime, and disinfect premises.
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