What tactic is effective for administering treatment to poultry if external parasites are found?

When dealing with external parasites in poultry, an effective tactic is to spray or dust the affected areas. This method allows for the direct application of treatment where it is needed most, targeting parasites that inhabit the skin and feathers. Sprays and dusts can effectively penetrate the areas where pests live, ensuring that the active ingredients are in contact with the parasites, leading to a higher likelihood of elimination.

Using oral medication, ointments, or injections may not provide the same level of effectiveness against external parasites. Oral medications generally treat internal issues or systemic infections rather than focusing on parasites that are located externally. Ointments might be useful in localized areas but can be less effective in covering larger affected areas or in preventing reinfestation. Injections, while useful for certain conditions, do not address the external infestation directly and may not reach the parasites that are outside of the bloodstream.

Thus, spraying or dusting is the preferred approach as it allows for widespread treatment and immediate relief from external parasites.