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In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth

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Dietary self-selection by broilers at normal and high temperature changes feed intake behavior, nutrient intake, and

S Syafwan¹, G J D Wermink, R P Kwakkel

¹Faculty of Animal Husbandry, University of Jambi, Indonesia. wan.syafwan69@gmail.com

Poultry Science

|February 16, 2012

Summary

Young chickens under heat stress can self-select a diet, choosing lower protein and higher energy options. This dietary adjustment helps manage heat load and maintain performance, indicating adaptive feeding strategies in broilers.

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Area of Science:

Animal Nutrition
Poultry Science
Environmental Physiology

Background:

Ambient temperature significantly impacts poultry physiology and feeding behavior.
Heat stress necessitates adaptive strategies in birds to mitigate metabolic heat production.
Dietary self-selection allows animals to modulate nutrient intake based on environmental conditions.

Purpose of the Study:

To investigate if young chickens can adjust their diet composition in a cafeteria system under high ambient temperature (HT).
To test the hypothesis that birds can select diets to minimize heat load associated with nutrient metabolism.
To evaluate the impact of dietary self-selection on growth, body temperature, and physiological stress indicators in broilers at HT.

Main Methods:

Broiler chickens were housed in either normal temperature (NT) or high temperature (HT) conditions from 1 to 42 days of age.
Choice-fed birds had ad libitum access to three diets varying in protein and energy content.
Control birds received a standard broiler diet; physiological and growth parameters were monitored.

Main Results:

High temperature (HT) reduced feed intake, protein intake, energy intake, and body weight gain compared to normal temperature (NT).
Choice-fed broilers consumed less protein and more energy, maintaining similar feed intake and body weight gain as controls under HT.
Choice-fed birds exhibited reduced panting behavior and maintained similar feed efficiency under HT, suggesting effective thermoregulation through diet selection.

Conclusions:

Broiler chickens demonstrate an ability to self-select a diet with lower protein and higher energy density when exposed to high ambient temperatures.
Dietary self-selection aids in managing metabolic heat load and maintaining growth performance under heat stress conditions.
Adaptive feeding strategies, including nutrient selection, are crucial for broiler resilience in challenging thermal environments.