What action best supports animal welfare when signs of distress or poor recovery are observed after a procedure?

• A. Early humane endpoints or euthanasia when indicated.
• B. Extend the study to collect more data.
• C. Ignore distress signs.
• D. Delay any welfare decisions until publication.

Answer: (A)

Best action is to use early humane endpoints or euthanasia when indicated. This approach prioritizes the animal’s welfare by preventing unnecessary pain and suffering as soon as signs of distress or poor recovery are evident. It relies on planning before the study to define clear endpoint criteria and on vigilant, ongoing monitoring so that distress is recognized promptly. When recovery is unlikely or distress persists despite supportive care, humane euthanasia minimizes suffering and aligns with ethical and regulatory responsibilities. Extending the study to gain more data would prolong distress, ignoring distress signs is unethical, and delaying welfare decisions until publication delays humane intervention and undermines animal welfare.