Which of the following instruments is typically used to insert de-wormer into an animal?

The instrument typically used to insert de-wormer into an animal is the drench gun. This tool is designed to deliver liquid medications, such as de-wormers, directly into the mouth of an animal, facilitating easy swallowing and ensuring that the medication is properly ingested. The drench gun usually has a long nozzle that allows for precise placement of the liquid at the back of the throat, minimizing the risk of choking.

While other instruments like the balling gun are also used for administering medications, they are specifically designed for solid tablets or boluses rather than liquids. A scalpel is a surgical instrument for cutting and not suitable for administering medications, while an IV tube is used for intravenous drug administration and would not be appropriate for the oral delivery of de-wormers. Understanding the appropriate use of each instrument is crucial for effective veterinary practice and ensuring the health and safety of the animal.