Livestock Nutrition –
Summary Learning Objectives
- Describe how animals digest food (monogastric vs ruminant)
- Explain how diet links to digestion
- Define and classify different types of feed
- Identify feeds used on farm
- Explain what a livestock ration is
- Adjust diets for age, species, and production stage
- Plan a basic ration for an animal
- Describe feeding systems and equipment
- Identify risks and work safely when feeding livestock
Livestock Nutrition videos
Here is a fully structured textbook-style chapter created from your PowerPoint. It is written in a clear, academic but accessible format suitable for Level 3 learners.
Livestock Nutrition
Livestock nutrition is a fundamental part of animal production, directly affecting health, welfare, productivity, and profitability. The role of the stockperson is to ensure animals receive a balanced diet that meets their needs at different stages of life and production.
Animals require:
- Maintenance nutrition – to stay alive (energy for body functions)
- Production nutrition – for growth, milk, reproduction, and work [L3 Livesto…rition ALL | PowerPoint]
A good feeding programme must also meet animal welfare standards, including the Freedom from hunger and thirst, one of the Five Freedoms. [L3 Livesto…rition ALL | PowerPoint]
What is Food and Nutrition?
Livestock feed consists of:
- Dry matter
- Energy (carbohydrates, fats, fibre)
- Protein
- Minerals and vitamins
- Water [L3 Livesto…rition ALL | PowerPoint]
Functions of Nutrients
| Nutrient | Function |
|---|---|
| Energy | Movement, heat, production |
| Protein | Growth, tissue repair, milk |
| Fibre | Gut health, rumen function |
| Minerals & Vitamins | Metabolism, health |
| Water | Digestion, transport, temperature control |
Energy and Protein in Livestock Diets
Metabolisable Energy (ME)
Metabolisable energy is the usable energy available to the animal after losses in faeces and urine. It is measured as MJ per kg of dry matter. [L3 Livesto…rition ALL | PowerPoint]
Energy is used for:
- Maintenance
- Production (milk, growth)
- Storage (fat)
- Losses (heat, methane, undigested feed)
Crude Protein (CP)
Protein is essential for growth and production. In ruminants, protein is divided into:
- RDP (Rumen Degradable Protein) – used by microbes
- UDP (Undegradable Protein) – digested in intestine
- NPN (Non-protein nitrogen) – used by microbes [L3 Livesto…rition ALL | PowerPoint]
Types of Animals and Feeding Behaviour
Animals can be classified by diet:
- Herbivores – plant eaters (cattle, sheep)
- Carnivores – meat eaters
- Omnivores – both (pigs, humans) [L3 Livesto…rition ALL | PowerPoint]
They can also be classified by digestive system:
- Monogastric (single stomach) – pigs, poultry
- Ruminants (four stomachs) – cattle, sheep
Digestion in Livestock
Stages of Digestion
- Prehension (food intake)
- Mastication (chewing)
- Chemical digestion (enzymes, acids)
- Absorption (nutrients enter blood)
Monogastric Digestion
Monogastric animals:
- Rely mainly on enzymes
- Have limited fermentation
- Digest high-energy, low-fibre diets efficiently [L3 Livesto…rition ALL | PowerPoint]
Main organs:
- Stomach (acid digestion)
- Small intestine (nutrient absorption)
- Large intestine (water absorption)
Ruminant Digestion
Ruminants have four compartments:
- Rumen – fermentation by microbes
- Reticulum – sorting and rumination
- Omasum – water absorption
- Abomasum – true stomach [L3 Livesto…rition ALL | PowerPoint]
Key features:
- Microbes digest fibre (cellulose)
- Produce volatile fatty acids (VFAs) as energy
- Can convert low-quality forage into usable nutrients [L3 Livesto…rition ALL | PowerPoint]
Feedstuffs and Feed Types
Main Feed Categories
- Forages (high fibre)
- Grass, silage, hay
- Concentrates (low fibre, high energy/protein)
- Cereals, soya, compound feeds [L3 Livesto…rition ALL | PowerPoint]
Definitions
- Forage: fresh or green high-fibre feed
- Fodder: preserved forage (e.g. hay, silage)
- Concentrates: dense feeds high in energy/protein [L3 Livesto…rition ALL | PowerPoint]
Examples of Feed Ingredients
- Energy feeds: cereals (wheat, barley, maize)
- Protein feeds: soya meal, peas, beans, fishmeal
- By-products: molasses, bakery waste, distillers grains
- Forage crops: grass, maize, brassicas, roots [L3 Livesto…rition ALL | PowerPoint]
Forage Production and Use
Forage crops are grown for feeding livestock and include:
- Grass
- Legumes (clover, lucerne)
- Roots (turnips, fodder beet)
- Brassicas (kale, rape)
- Forage maize [L3 Livesto…rition ALL | PowerPoint]
Silage
Silage is preserved forage made by fermentation:
- Stored in clamps or bales
- Maintains feed quality
- Provides winter feed [L3 Livesto…rition ALL | PowerPoint]
Livestock Rations
What is a Ration?
A ration is the total amount of feed given daily, balanced to meet the animal’s requirements. [L3 Livesto…rition ALL | PowerPoint]
A balanced ration includes:
- Energy
- Protein
- Fibre
- Vitamins and minerals
- Water [L3 Livesto…rition ALL | PowerPoint]
Factors Affecting Rations
Rations vary depending on:
- Species
- Age
- Production stage (growth, lactation, finishing) [L3 Livesto…rition ALL | PowerPoint]
Typical Nutritional Requirements
- Growing animals: high protein for muscle development
- Finishing animals: higher energy for fat deposition
- Lactating animals: high energy and protein
- Maintenance: lower nutrient requirement [L3 Livesto…rition ALL | PowerPoint]
Example: Pig Rations
| Stage | Protein % | Energy | |
|---|---|---|---|
| Weaners | 19–21% | High | |
| Growers | 17–18% | Moderate | |
| Finishers | 14–16% | Slightly lower protein | [L3 Livesto…rition ALL | PowerPoint] |
Water in Livestock Nutrition
Water is essential for:
- Digestion
- Temperature control
- Feed intake
Example:
- Pigs need approximately 2.5–3 parts water to 1 part feed [L3 Livesto…rition ALL | PowerPoint]
Poor water supply reduces feed intake and performance.
Feeding Systems
Types of Feeding Systems
- Trough feeding
- Ring feeders
- Automatic feeders
- Total Mixed Rations (TMR) [L3 Livesto…rition ALL | PowerPoint]
Total Mixed Ration (TMR)
- Mixes forage and concentrates together
- Improves feed consistency
- Reduces selective feeding [L3 Livesto…rition ALL | PowerPoint]
Animal Welfare and Feeding
Feeding systems must meet the Five Freedoms:
- Freedom from hunger and thirst
- Freedom from discomfort
- Freedom from pain, injury, disease
- Freedom to express normal behaviour
- Freedom from fear and distress [L3 Livesto…rition ALL | PowerPoint]
Health, Safety and Legislation
Feeding livestock must comply with:
- PUWER – safe equipment use
- LOLER – safe lifting equipment
- COSHH – handling hazardous substances
- Manual handling regulations [L3 Livesto…rition ALL | PowerPoint]
Key Concepts Summary
- Livestock require balanced diets for health and productivity
- Nutrients include energy, protein, fibre, vitamins, minerals, and water
- Digestive systems determine feeding strategy
- Ruminants utilize forage efficiently, monogastrics rely on concentrates
- Feeding systems and ration formulation directly impact output and welfare
Review Questions
- Define metabolisable energy (ME).
- Compare monogastric and ruminant digestion.
- Explain the difference between forage and concentrates.
- Why do protein requirements change with age?
- Describe the importance of water in livestock diets.
Below is presentation which gives more details about “Livestock Nutrition.”
