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The study assesses how a Bacillus-based probiotic affects feed intake, immune, and metabolic responses in beef heifers under stress conditions.

Feeding a Bacillus-based Probiotic to Beef Heifers During Stress Challenges: Effects on Feed Intake, Immune, and Metabolic Responses

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Experiments evaluate a Bacillus-based probiotic's impact on metabolic and immune responses in beef heifers during stress.

The study assesses how a Bacillus-based probiotic affects feed intake, immune, and metabolic responses in beef heifers under stress conditions.
Conducted three experiments with 16 Angus-influenced heifers over 35 days.
Administered Bacillus-based probiotic or control treatment daily.
Measured hay intake, rectal temperature, and blood samples during stress challenges.
No significant effects on feed intake or immune response from the probiotic post-vaccine.
BAC heifers showed improved hay intake and lower cortisol levels post-LPS compared to CON heifers.
Inflammatory markers were lower in BAC heifers, indicating reduced inflammatory response.

Souza et al. (2026) studied this question.

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