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Heat stress in cattle

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El Lechero Dairy Basics - Herd Health
Written by Robert B. Moeller Jr.   
Thursday, 16 June 2011 11:56

Outside environmental temperatures exceeding 100°F can cause significant stress on cattle. This heat stress is often enhanced by excessive humidity.

el_english_badgeWhen the heat index (a combination of temperature and humidity, which are added together to give one an idea of how hot it feels outside) exceeds 100°F, cattle may become significantly stressed, resulting in decreased milk production, poor reproductive performance, increased incidences of mastitis, uterine and other infections and death.


Herdsman mistakes can be avoided

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El Lechero Dairy Basics - Herd Health
Written by Tom Fuhrmann   
Monday, 02 May 2011 08:42

An important part of a herdsman’s job is to treat sick cows. Good herdsmen draw upon their knowledge, experience and what they learn from the owners of their dairies, veterinarians or other specialists. But the best herdsmen not only do the right thing, they do the right thing all the time.

el_english_badgeMagazines like El Lechero help you by providing information to diagnose and treat sick cows. So let me explain how to avoid some mistakes I see which prevent good herdsmen from being great.


Questions about milk quality: Contagious and environmental mastitis

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El Lechero Dairy Basics - Herd Health
Friday, 29 April 2011 14:22

What is the difference between contagious and environmental mastitis pathogens, and why does it matter?

Mastitis is caused by many different types of bacteria, which invade the udder by gaining access through the teat canal. Once inside the gland, these microorganisms multiply and produce harmful substances that result in inflammation, reduced milk production and altered milk quality.

Microorganisms that most frequently cause mastitis can be divided into two broad categories: contagious pathogens and environmental pathogens.


Nature vs. nurture: Cow comfort and its effect on animal health

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El Lechero Dairy Basics - Herd Health
Written by Fabian Bernal   
Friday, 29 April 2011 13:52

Metabolic and environmental stress during the transition period and through lactation alters the efficiency of the immune system, making cows more susceptible to infectious diseases with subsequent impairment of productive and reproductive performance; as well as the physiological consequences of a stressful environment. This includes competition for feed and ranking within the group, cow comfort, overall environment, weather and human contact with animals, among others.

The role of dairy managers and herdsmen is to ensure that good agricultural, hygienic and animal husbandry practices are employed. The focus should be on preventing a problem rather than solving it after it has occurred.


Using ventilation to eliminate heat stress

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El Lechero Dairy Basics - Herd Health
Written by James Kleinke   
Friday, 29 April 2011 10:48

As I travel in our Southwest states, I quickly recognize heat stress is already starting to impact milk production.

Studies have indicated that the upper limit/critical temperature for heat stress will begin between 70˚F to 80˚F and can start as low as 68˚F for lactating dairy cattle.

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