As global temperatures rise, extreme heat is emerging as a major challenge for cattle producers-even in traditionally temperate regions. As such, heat stress compromises cattle health and performance, leading to lower productivity, increased vulnerability to disease, and significant financial losses.

 

Among the most affected parts of the cattle during hot seasons are the gastrointestinal tract. Often overlooked, gut health in animals is not merely a digestive concern; it is central to immune function, nutrient absorption, and systemic resilience. According to studies, heat stress affects the gut system of cattle, especially in young calves. Because their bodies are still underdeveloped, their immune responses remain weak against sudden weather changes. High humidity particularly affects their gut functions, which disrupts the regulation of body temperature, and may lead to reduced performance, lower feed intake, increased susceptibility to disease, and decreased conception rates.

 

Therefore, young calves-starting from the very first day of life-require careful management, as this stage is considered critical for their development into healthy adults. Fortunately, Lallemand (pp. 8–9) and Phytobiotics (pp. 10–11) have developed nutritional solutions for young calves, specifically targeting the susceptibility of their gut systems under hot weather conditions. Lallemand underscores the importance of early nutrition during the critical phase of the young calves, especially when they transition from liquid to solid feed. The weaning period in young calves is a critical stage often associated with digestive challenges. To address this, Lallemand highlights the importance of appropriate feeding strategies-such as milk replacers and starter diets-to support optimal performance through to maturity. On the other hand, Phytobiotics offers viable solutions to combat heat stress in young calves during their early stages, particularly when they still rely on maternal immunity and the intake of quality colostrum-both of which can be compromised in heat-stressed cows.

 

It is often emphasised that a good livestock performance begins on day one. Ensuring the well-being of young calves from the start directly contributes to longterm productivity and immune competence, even under challenging weather conditions. Effective calf nutrition, therefore, requires strategic feeding practices, a sound understanding of digestive physiology, and the provision of favourable environmental conditions. Heat stress in young calves should not be seen as a temporary seasonal concern but as a critical factor affecting gut health, with lasting consequences for lifetime productivity. By recognising the unique vulnerabilities of young calves, producers can implement targeted interventions that enable them to withstand climate-related challenges, build resilience, and support overall health until maturity.

 

The full article is published on the SEPTEMBER 2025 issue of LIVESTOCK & FEED Business. To read the full report, please email to inquiry@efeedlink.com to request for a complimentary copy of the magazine, indicating your name, mailing address and title of the report.