Which of the following is NOT required in a written anesthesia log?

A written anesthesia log serves as an important record-keeping tool for veterinary practices, ensuring that all relevant details pertaining to a patient's anesthesia are documented for safety, legal, and medical purposes.

In this context, while the animal's name, owner's information, and recovery status are crucial components that provide essential identification and track the animal's welfare through the anesthesia process, the animal's coloration or distinguishing markings, while useful for identification in some cases, is not deemed a necessary element in the anesthesia log itself. The primary focus lies on critical data like the owner’s details to contact them during procedures or emergencies, the animal’s name for precise identification during treatment, and recovery status to monitor and ensure the animal’s well-being post-anesthesia.

Thus, the absence of coloration or distinguishing markings from the log does not compromise essential aspects of patient safety and care, which is why this detail is not required.