Drenching is a procedure where fluids or pastes are discharged into the mouth. Some basic recommendations include keeping excitement and stress on the animal to a minimum, not rushing the job, holding the animal's head level at all times, and keeping drenching nozzles and tips smooth to prevent abrasions and lacerations in the mouth. When drenching or administering any liquid into the mouth of an animal, it is essential that the liquid be administered into the esophagus and not into the lungs. The following suggestions will help make sure this happens when using different drenching guns.
This diagram shows the internal anatomy of the mouth and throat (pharynx) regions of the head. Note the epiglottis and the openings to the lungs and stomach.
Drenching
Gun with Short Spout - Epiglottis Open
When using a drenching gun with a shorter spout, the passageway to windpipe (trachea) is open! Fluids drenched in this manner can easily enter the windpipe and either cause death or serious pneumonia.
If a gun with a shorter spout is used, administer the liquid slowly and allow the animal plenty of time to swallow.

Gun with Long Spout - Epiglottis Closed
When using a drenching gun with a longer spout, carefully push the tip of the gun to the back of the tongue. This will stimulate the swallowing reflex and cause the epiglottis to cover the windpipe (trachea). With the opening to the windpipe covered, the liquid will safely enter the esophagus and stomach.
Information above came from:
Animal Health Publications
P.O. Box 28
Preston, Idaho 83263
1-877-4-AHP-VET (Toll Free)
(1-877-424-7838)
Visit their website at http://www.infovets.com

Supervet Drenching Gun
Automatic adjustable drencher and injector suitable for most drenches and solutions.  Refills automatically from plastic container without gravity.  Comfortable aluminum alloy handle & level.  Adjustable, dripless SST nozzle.  Graduated transparent barrel.  Capacity 20 ml
This page was last updated on: January 6, 2008
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Example of a drenching gun