Sector News19-6-2018
For a cow to achieve optimum performance, their ambient temperature should be between 5°C and 25°C.
There will be some variation, according to breed, weight and feeding levels, but this is a useful target temperature range to keep in mind. If cows are left exposed to temperatures in excess of 25°C for prolonged periods of time, heat stress occurs and cows will start cooling themselves down by panting, drooling and increasing internal blood flow.