Animal Requirements. Requirements Tables should be thought of as a guide Minimum requirement for an “average” animal Many factors affect requirements.

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Presentation transcript:

Animal Requirements

Requirements Tables should be thought of as a guide Minimum requirement for an “average” animal Many factors affect requirements

What Affects Requirements? Species Breed Weight Body condition Age Sex Growth Stage of gestation Milk production Physical activity Environment Others (disease, stress)

Requirements Tables don’t include: Breed Genetic potential Body condition Environment, stress, disease, parasites Feed additives, etc.

Requirements By understanding these other factors Can make adjustments Month of cold weather Moving to a hilly pasture Excess body condition

Requirements Have four major components: Maintenance Reproduction Lactation Growth

Maintenance No productive functions Breath, move, digest, keep warm, etc. Weight

Maintenance What livestock animal is truly at maintenance? Mature gelding, no activity Mature ewe, after weaning

Maintenance

Reproduction Stage of gestation – last third Expected birth weight, number Includes development of maternal tissue and fetus Fetus has priority over maternal Body reserves may be depleted Deficiencies affect fertility, puberty

Reproduction

Lactation Greatest nutrient demands Amount of milk

Lactation

Growth Actual weight ADG (growth rate) Mature weight

Growth

Tables DM intake is not a requirement Used as a guideline Requirements both as: Concentration Amount per day ***