27/03/2026
🐄 Professor Geoffrey Dahl joined us from the USA this week to give an insight into his latest research into heat stress.
Some key points included:-
🐮Heat stress doesn't just impact on the milking herd
🐮Dry cows exhibit carryover effects of heat stress into early lactation
🐮In utero heat stress reduces passive immune transfer regardless of colostrum source
🐮The affects extended to the heifer calf of a heat stressed cow include poorer health and less milk
🐮Studies have shown that cows can lose up to 4 litres per day due to heat stress
On a more practical level there were also some good discussions about the benefits of soaking cows with water rather than misting and considering drawing clean air into sheds where we have fans.
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Thanks to Carolina from Phibro Animal Health for organising the talks and to the hosts of our farm walk Richard and Rachael Petherick.