Managing Heat Stress Episodes in Confined Cattle
Kevin F Sullivan1, Terry L Mader2
1Bell Veterinary Services, 49-53 Dennis Street, Queensland 4408, Australia.
Summary
Feedlot cattle generate significant heat, leading to heat stress in summer. Strategies like providing shade, water, and adjusting feeding can mitigate heat accumulation and its negative effects.
Area of Science:
- Animal Science
- Environmental Physiology
Background:
- Feedlot cattle rapidly gain weight, producing substantial metabolic heat.
- High ambient temperatures, especially in summer, impede heat dissipation, causing heat accumulation and heat stress.
Purpose of the Study:
- To identify key indicators of heat stress in feedlot cattle.
- To outline management strategies for mitigating heat stress in cattle.
Main Methods:
- Monitoring respiratory rates and panting scores.
- Observing behavioral changes in cattle.
- Evaluating environmental management interventions.
Main Results:
- Elevated respiratory rates, panting scores, and specific behavioral changes indicate heat stress.
- Management interventions such as reduced cattle movement, increased water availability, pen surface cooling, and nutritional adjustments are effective.
Conclusions:
- Heat stress in feedlot cattle is a significant concern during hot weather.
- Proactive management strategies, including environmental modifications and feeding adjustments, are crucial for cattle welfare and productivity.
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