Dairy cows exposed to neutral-to-earth voltage can exhibit three general types of symptoms:

Behavior changes

• Hesitate or refuse to approach certain waterers, feeders, or metallic equipment.
• Hesitate to enter parlor or jump across transition joints.
• Tread, kick, or appear nervous while milking.
• Increased defecation and/or urination in milking parlor.
• Reluctant to consume water or feed.

Milking problems

• Poor milk letdown and incomplete or uneven milkout (leaving abnormal amounts of residual milk in one or more quarters).
• Increased milking time.

Poor production

• Increased mastitis.
• Lowered milk production.
  

It is important to remember, however, that these conditions may be caused by sources other than N-E voltage. These include poor milking practices, improperly sized or malfunctioning equipment, improper feed, poor herd health or poor herd management. All possible causes should be examined to determine the appropriate corrective procedure.

Neutral-to-Earth Voltage

Who is affected?

What is the source of neutral-to-earth voltage?

What are the possible remedies?

What to do if you suspect neutral-to-earth voltage?

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