What is a valid reason for not reporting a sudden animal death?

Choosing to not report a sudden animal death may be justifiable if the cause of death is unrelated to the established procedures or protocols that dictate reporting requirements. For example, if an animal was undergoing a rigorous monitoring process for a specific treatment or experiment, but died from an unrelated issue—such as an unexpected natural cause or an illness not connected to the study—it may not be deemed necessary to report that death. This aligns with maintaining focused and relevant reporting that is associated with the specific activities of the protocol in question. Other factors such as previously known health issues or close monitoring, while important, do not inherently justify the decision to omit a report if the cause of death is outside the realm of the research or treatment being conducted.