Question

Which of the methods of drying a cow during lactation is considered best?

• A. Stopping milking forth-with
• B. Incomplete milking
• C. Intermittent milking
• D. Suckling by calf

Hint:

Ensure that a cow's daily milk yield is below \(10-12\text{ kg}\) before drying her off abruptly. If her yield is higher, reduce her feed concentrate for a few days beforehand to lower her production.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
"Drying off" is the practice of stopping milk production at the end of a cow's lactation.
This provides a dry period of \(50\) to \(60\) days before the next calving, allowing the udder tissue to regenerate.

Step 2: Detailed Explanation:
There are three main drying-off methods:
1. Abrupt Cessation (Stopping milking forthwith): Milking is stopped completely on a set day.
2. Intermittent Milking: The frequency of milking is gradually reduced over several days.
3. Incomplete Milking: The udder is not fully emptied during the final milkings.
Among these, stopping milking forthwith (abrupt cessation) is considered the best method in modern dairy farming.
Stopping milking abruptly causes pressure to build up quickly in the mammary gland.
This pressure triggers a natural feedback mechanism that stops further milk secretion, leading to rapid and clean involution of the udder.
When combined with "dry cow therapy" (administering intramammary antibiotics after the final milking), this method is highly effective in preventing mastitis.
Incomplete or intermittent milking can prolong milk secretion and increase the risk of introducing bacteria into the teat canal.

Step 3: Final Answer:
The best drying-off method is Stopping milking forth-with.