Why Invest in Ventilation?
Short Term Benefits:
Long Term Benefits:
When experiencing heat stress a cow stops eating and 2-3 days later milk yield and quality declines.
Leading US dairy consultant Michael Wolf explained following analysis of the UK dairy industry, if a UK dairy farmer experiences a yield loss of 2.25kg a cow per day, over a 6 week period a 100 cow herd with a milk price of 0.25p experiences a loss of £2,350.00.
The cow spends more time standing, to expel excess heat, which increases pressure on her hooves exacerbating the lameness burden.
Impacts of heat stress are not limited to the dry cow alone but the body temperature of her unborn calf also increases. This alters the calf’s metabolism and gene expression, resulting in smaller calves at birth and negative implications for the calf’s lifetime performance, and negatively impacting future generations of the herd.
Heat stress lowers reproductive performance in cows by increased internal temperatures depleting hormone regulation. This reduces oestrus intensity, decreasing embryo implantation and decreasing rates of embryonic death. In the same way, heat stress in male animals causes changes in sperm conditions further depleting the chances of reproductive success.
Poor reproductive performance causes an increase in culling rates as well as reduced performance of dry cows in her subsequent lactation by causing setbacks in mammary cell development.
Heifers treated for pneumonia as calves had shorter longevity than their cohorts, achieve your herds genetic potential by ventilating your buildings (Closs et al., 2017).
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Ventilating Calf Units
Ventilation in the calf unit is critically important for the success of any cattle business. While milk yield is the most obvious loss following a period of heat stress, there are greater and more serious costs and implications including respiratory health and herd fertility, and that are too often overlooked.
Files & Resources
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