Avocado Toxicity Kills Seven Ducks in Backyard Flock
Southwest Victoria, Australia – Agriculture Victoria has investigated a sudden mass die-off of ducks linked to avocado toxicity, highlighting a lesser-known danger in backyard poultry.
"The owner noted the last feed included six whole avocados 6-7 hours before deaths."
The case was triggered in April 2025 when a call to the Emergency Animal Disease Hotline reported a grim scene: seven of 18 ducks died within minutes of each other. A District Veterinary Officer performed a post-mortem and initially tested for Highly Pathogenic Avian Influenza (HPAI), a standard protocol for sudden bird deaths.
The affected ducks were co-housed with 10 chickens and 11 other ducks, most of which appeared normal. The owner reported no prior illness or dead wild birds. The key clue emerged from the feed history: the last meal given 6-7 hours prior included six whole avocados.
Suspected avocado toxicity was confirmed via history, clinical signs, and laboratory testing at Agriculture Victoria's Veterinary Diagnostics Laboratory at AgriBio.
Why avocados are deadly to birds
Avocados contain persin, a fungicidal toxin that is safe for humans but can be fatal to many birds. In poultry, persin causes lethargy, difficulty breathing, appetite loss, swelling, and sudden death. Treatment is largely supportive and often unsuccessful once symptoms appear.
Key takeaways from the incident:
- Prompt reporting worked: The case was identified due to the owner's quick call to the Emergency Animal Disease Hotline.
- Rule out infectious disease first: Authorities tested for HPAI before confirming the toxic cause.
- Avocados are a no-go: Even small amounts can be lethal to ducks and chickens.
"The case underscores the importance of reporting unusual animal deaths promptly."
Agriculture Victoria reminds poultry owners that while avocados are a popular human food, they pose a serious risk to backyard birds and should never be included in feed.