Cooler cows have healthier calves
Environmental influences affecting cows during pregnancy have been shown to induce life-long physical and metabolic changes in the offspring. To learn more about the effects of heat stress on calves conceived during the summer, scientists examined data from more than 150 herds of dairy cattle in Florida, where cows experience hot summers and mild winters.
Previous studies have shown many different effects related to environmental or dietary stressors during pregnancy on the resulting offspring, both as calves and as adult cows, and summer heat is a significant environmental stressor in many areas of the United States. The researchers assessed seasonal effects on pregnancy by examining more than 667,000 records from Holstein cows calving in Florida between 2000 and 2012. Using environmental data from the National Oceanic and Atmospheric Administration, the researchers estimated the resulting heat stress on each of the 152 herds by comparing milk yield during summer and winter months to identify which herds were most likely to suffer from heat stress during the summer……….
READ MORE Source: Cooler cows have healthier calves: Calves born to cows experiencing heat stress during early pregnancy experience related effects that continue throughout their lives, according to a new study from the Journal of Dairy Science®