What is a preventive measure against external parasites in poultry?

Sevin, a brand name for carbaryl, is an insecticide commonly used in poultry management to control external parasites such as mites, lice, and fleas. Its application as a poultry dust provides a direct method of treating birds and their environment, making it an effective preventive measure in keeping external parasites at bay.

Regular use of Sevin can help maintain a healthful environment for poultry, minimize stress, and improve overall flock performance. This aligns well with good husbandry practices, which emphasize proactive measures to ensure the health and well-being of the birds.

The other options do not serve the same purpose in protecting against external parasites, as sugar water is typically used for hydration or energy boosts, Pepto-Bismol is a remedy for digestive issues in animals and humans, and Vitamin D3 is crucial for proper bone health and calcium absorption but does not address the issue of external parasites directly.