When talking about environmental impact in dairies, most would think about carbon footprint or water quality. However, a University of Florida study determined it is most ideal to cool dry cows during the entire dry period to prevent milk loss. The same should be provided for bred heifers.
Researchers found reduced dry matter intakes pre-calving and weaker immunity pre- and post-calving. Heat-stressed cows can also have a shorter gestation length and dry period, opening the door for more long-term effects and more health incidents.
Source: Hoard’s Dairyman, June 3, 2021. Link. 89 percent of U.S. dairy cows experience 55 to 81 heat stress days per year. Alycia Drwencke analyzed the milk price and days of heat stress annually finding the positive financial results from shade justify building a new barn to provide cooling for dry cows.
Milk production can be as high as 5 pounds more per day in cooled heifers. . . “ – Alycia Drwencke
INSIGHTS: Whether veterinarian, retailer or sales representative, your dairy customers will thank you for showing them this information. Beyond the economics, consider the longevity and health benefits afforded to shaded dry cows and bred heifers. Share the benefits with your dairy customers. Then they can decide whether adding shade will pay in their operation and for their cows.
It would also be good to share this information with extension people and lenders in your main geographies.