Animal Nutrition (Nutrition): Understanding Nutrients, Problems, and Practical Feeding Decisions

Nutrition

The process of supplying animals with nutrients to maintain life, grow, reproduce, and stay healthy.

Nutrients

Substances in feed and water that the body uses to perform essential functions.

Water

The most essential nutrient, crucial for blood circulation, digestion, and chemical reactions inside cells.

Carbohydrates

Major energy source; includes structural carbohydrates (fiber) and non-structural carbohydrates (starches, sugars).

Fats

Concentrated energy source that provides essential fatty acids and aids in vitamin absorption.

Proteins

Made of amino acids; essential for tissue building, enzymes, hormones, and immune function.

Essential Amino Acids

Amino acids that must be obtained from the diet.

Minerals

Inorganic nutrients important for structure, fluid balance, and nerve/muscle function.

Macrominerals

Minerals needed in larger amounts, including calcium, phosphorus, sodium, and potassium.

Trace minerals

Minerals required in small amounts but are still essential, such as copper and zinc.

Vitamins

Organic compounds that support metabolism and various body functions.

Fat-soluble Vitamins

Vitamins A, D, E, K, stored in body fat and potentially toxic if oversupplemented.

Water-soluble Vitamins

Vitamins B-complex and C, generally not stored, higher risk of deficiency.

Energy

The function of nutrients converted into usable energy for growth and maintenance.

Ruminants

Animals like cattle that ferment fiber in their rumen to obtain energy.

Monogastrics

Animals like pigs that digest starch, fat, and protein using enzymes, without rumen fermentation.

Hindgut fermenters

Animals like horses that ferment fiber in the cecum and colon.

Digestive system type

Determines what constitutes good nutrition based on how different species extract nutrients.

Dry Matter (DM)

The portion of feed that excludes water, important for comparing nutrient densities.

Energy Imbalance

A condition where energy intake does not meet the animal's requirements, leading to deficiencies or excess.

Body Condition Scoring (BCS)

A practical tool used to assess an animal's long-term energy balance.

Calcium and Phosphorus

Essential minerals for bone structure and cellular functions; balance between them is crucial.

Magnesium

A mineral essential for nerve and muscle function, with low availability linked to severe health issues.

Water Quality

The cleanliness and suitability of water for consumption, critical to avoid intake issues.

Phase Feeding

Adjusting diet composition at different growth stages to meet changing nutritional needs.

Ad Libitum Feeding

A feeding method allowing animals to eat freely, which can lead to obesity if not managed properly.

Competition for Feed

Occurs when timid animals cannot access feed due to bullying or lack of adequate space.

Nutrient Deficiency

A lack of essential nutrients, often leading to poor growth, dull coats, and low production.