HEAT STRESS IN DAIRY COWS REDUCES THE MILK YIELD
Dairy cows are endothermic animals (homeothermic).
They maintain their body temperature around 101.4 °F – 102.5 °F.
During heat stress, the body temperature rises above the upper critical temperature of the body.
So the cows can not dissipate the heat load efficiently leading to heat stress.
At this stage sweating, panting will not be a solution to get rid of heat stress completely.
Also by the ruminal fermentation process, an additional amount of heat is produced in addition to the environmental temperature. This causes accumulation of heat loads within the body.
This condition has a dramatic effect on feed intake and milk production.
* Symptoms of heat stress*
*Feed intake reduces *Frequent laminitis *Milk yield reduces *Sweating
*Excessive drooling *Excessive salivation
*Restlessness *Increased thirst
*Refuse to lie down
Loss of milk quality *Loss of body weight *Milk fever and infections mastitis Coma Etc:
*Management of heat stress
*Provide shade, cold water therapy, availability of fresh water all the time. Showering the animals.
*Increase ventilation * Supply cool fresh water
*Dietary management to prevent acidosis * Installation of fans, sprinklers
Frequently usage of vitamin c and glucose.