Question

The best age of dehorning is

• A. 16 week
• B. 4 week
• C. 8 week
• D. 1 week

Hint:

Remember: "Early debudding is better than late dehorning." Preventing horn growth within the first 7 days (1 week) of life using a hot iron or caustic stick is the most humane and efficient method.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Dehorning is the process of removing or preventing the growth of horns in livestock, particularly cattle, goats, and sheep.
Horns are removed to prevent injuries to other animals and handlers, reduce aggression, and facilitate safer handling and transport.
Preventing horn growth at a very young age (before the horn buds attach to the skull) is called "debudding," which is much safer and less painful than dehorning older animals.

Step 2: Detailed Explanation:
The best age to perform dehorning (debudding) is within the first week of life, ideally between 1 to 7 days of age (Option D).
At this early stage:
1. The horn cells are present only in the skin as a small, unattached "bud."
Because the bud has not yet fused with the underlying frontal bone of the skull, it can be easily destroyed using chemical or thermal methods.
2. Methods of Debudding:
- Chemical debudding: A caustic potash stick (sodium or potassium hydroxide) is rubbed over the moistened horn bud to destroy the horn-producing cells.
- Thermal debudding: An electrical or gas-heated hot iron is applied to the bud for a few seconds to cauterize the tissue.
3. Advantages of early debudding (under 1 week):
- The procedure causes minimal pain, stress, and bleeding.
- There is no risk of exposing the frontal sinus, which is a major complication when dehorning older animals.
- The wound heals rapidly, minimizing the risk of secondary bacterial infection or maggot infestation.
Performing the procedure at 4, 8, or 16 weeks of age is more painful and difficult because the horn has already fused to the skull and begun to grow, requiring more invasive surgical removal.

Step 3: Final Answer:
The best age for dehorning (debudding) is 1 week of age.
Therefore, the correct option is (D).