Who should be trained on recognizing signs of distress and when to intervene or euthanize?

• A. All personnel involved in a protocol
• B. Only veterinarians
• C. Only the principal investigator
• D. No specific training required

Answer: (A)

All personnel involved in a protocol should be trained to recognize signs of distress and know when to intervene or euthanize. Frontline observers—animal care staff, technicians, and researchers—are the first to notice changes in appearance, behavior, or physiology, so their ability to identify distress quickly is essential. Training ensures they understand which signs indicate distress, what constitutes a humane endpoint, and the proper steps to take or whom to consult, in line with the protocol and regulatory requirements. It also covers documentation and escalation procedures, so actions are consistent and traceable. Limiting training to veterinarians or the principal investigator would leave other staff unprepared to respond promptly, potentially allowing suffering and risking noncompliance with welfare and regulatory standards.