GUIDE

Lab Animal Death Reports:
OLAW Compliance Template

Properly documenting animal deaths is critical for OLAW compliance and IACUC oversight. This guide provides step-by-step instructions for recording euthanasia methods, classifying deaths, and maintaining audit-ready records.

Last updated: June 29, 2026 · 12 min read

Why Death Reporting Matters

Under the Public Health Service (PHS) Policy on Humane Care and Use of Laboratory Animals, institutions receiving federal funding must maintain accurate records of all animal deaths. The Office of Laboratory Animal Welfare (OLAW) requires that unexpected deaths be reported and investigated, and that all euthanasia procedures follow AVMA Guidelines.

Incomplete or inaccurate death records are among the most common compliance deficiencies found during OLAW investigations and AAALAC audits. An automated system ensures every death is documented consistently, classified correctly, and retained for the required period.

1

Record the Time and Cause of Death

The foundation of compliant death documentation is capturing the essential facts immediately:

  • Animal identification: Unique ID, species, strain, sex, and age
  • Protocol number: The IACUC protocol under which the animal was housed
  • Date and time: Exact time of death or time discovered
  • Cause of death: Primary cause (e.g., experimental endpoint, natural death, euthanasia)
  • Personnel: Who observed or performed the procedure

Pro Tip: LabAnimal automatically timestamps all death records and links them to the animal's complete history, ensuring nothing is missed.

2

Document the Euthanasia Method (AVMA Guidelines)

All euthanasia must follow the AVMA Guidelines for the Euthanasia of Animals. Document the following for each procedure:

  • Method: CO2 inhalation, injectable barbiturate (pentobarbital), inhalant anesthetic, or physical method
  • Agent and concentration: e.g., CO2 at 100% with gradual fill, pentobarbital at 150 mg/kg IP
  • Exposure time: Duration of exposure before death confirmed
  • Confirmation of death: Secondary method (cervical dislocation, bilateral thoracotomy) and who confirmed

Common Finding: Failure to document the secondary confirmation of death is the most frequent AVMA compliance gap. Always record who confirmed death and by what method.

3

Classify the Death

Proper classification determines the reporting pathway. Classify each death along two axes:

  • Expected vs. Unexpected: Expected deaths align with humane endpoints defined in the protocol. Unexpected deaths include those from anesthesia complications, equipment failure, fighting, or unknown causes.
  • Protocol-related vs. Incidental: Protocol-related deaths result from the experimental procedures. Incidental deaths occur from causes unrelated to the study (e.g., congenital defects, natural aging).

Unexpected and protocol-related deaths require the most detailed documentation and may trigger IACUC review or OLAW reporting.

4

Complete Necropsy Documentation

Necropsy (post-mortem examination) is required for unexpected deaths and may be required by your IACUC protocol for all deaths. Document:

  • Gross pathology: Observable abnormalities in organs and tissues
  • Tissue samples: What was collected, preserved, and sent for histopathology
  • Preliminary cause of death: Based on gross examination findings
  • Final diagnosis: Updated after histopathology results (if applicable)
  • Pathologist: Name and qualifications of the person performing the necropsy
5

Update Animal Inventory Records

Immediately update your animal management system when a death occurs:

  • Remove the animal from active inventory and cage assignments
  • Update cage cards to reflect the current population
  • Adjust colony counts for breeding colonies
  • Update billing records if per-animal charges apply
  • Generate updated census reports for IACUC annual reviews

Delayed inventory updates lead to discrepancies between reported and actual animal numbers, which auditors flag as a compliance concern.

6

Report to IACUC

Unexpected deaths and protocol deviations must be reported to the IACUC. Your report should include:

  • Timeline: Most institutions require reporting within 5 business days of discovery
  • Root cause analysis: What caused the death and why it was unexpected
  • Corrective actions: Steps taken to prevent recurrence
  • Pattern analysis: Whether similar deaths have occurred (clusters may indicate systemic issues)

Critical: If unexpected deaths exceed thresholds defined in your Assurance (e.g., significant or continuing noncompliance), you must report to OLAW directly within the timeframe specified in your institution's PHS Assurance.

7

Archive Records for Audit Trail

All death records must be archived with a complete audit trail:

  • Immutable records: Once finalized, death records should not be editable (only appendable)
  • Audit trail: Every access, modification, and review must be logged with timestamp and user ID
  • Retention period: Minimum 3 years after study completion (OLAW requirement); many institutions retain 5-7 years
  • Backup: Records must be backed up and recoverable in case of system failure
  • Accessibility: Records must be retrievable for IACUC review, OLAW investigation, or AAALAC audit

LabAnimal Feature: All death records are automatically archived with digital signatures and tamper-proof audit trails. Records are retained for the configured retention period and easily retrievable for audits.

Frequently Asked Questions

What is OLAW's requirement for death reporting?

Under PHS Policy IV.D, institutions must report any unexpected deaths, adverse events, or protocol deviations to OLAW. Expected deaths at approved endpoints require summary reporting in annual reviews. All deaths must be documented in the animal's medical record with date, time, cause, and euthanasia method.

What euthanasia methods does AVMA approve?

The AVMA Guidelines for the Euthanasia of Animals (2020 edition) approves several methods: CO2 inhalation (for rodents, with specified flow rates), injectable barbiturates such as pentobarbital (preferred for most species), inhalant anesthetics (isoflurane, sevoflurane), and physical methods (cervical dislocation for small rodents under 200g, decapitation). Each method has species-specific requirements for acceptable use.

Do I need to report every animal death?

Not every death requires an individual report to OLAW. Expected deaths at IACUC-approved humane endpoints are documented in individual records and summarized in annual reports. Unexpected deaths, deaths due to protocol noncompliance, or deaths caused by equipment failure must be individually reported to the IACUC and potentially to OLAW, depending on severity and institutional policy.

How long must death records be retained?

OLAW requires that animal death records be retained for a minimum of 3 years after completion of the research or study. For FDA-regulated studies under 21 CFR Part 11, records may need to be retained for the duration of the study plus additional years depending on the specific regulation. Many institutions adopt a 5-7 year retention policy as a best practice.

What is the difference between expected and unexpected deaths?

Expected deaths are those anticipated in the IACUC protocol, such as animals reaching defined humane endpoints (tumor size limits, weight loss thresholds, clinical scoring criteria) or natural death in aging studies. Unexpected deaths are any deaths not predicted by the protocol, including deaths from anesthesia complications, equipment failure, fighting, or unknown causes. Unexpected deaths require investigation, documentation, and IACUC notification.

Streamline Your Death Reporting Workflow

LabAnimal automates death documentation with AVMA-compliant templates, IACUC notifications, and tamper-proof audit trails. Free for up to 500 animals.

Start Free Read Docs