What is persin?
Persin is a fungicidal toxin naturally found in avocados. It helps the plant fight off mold—but it’s not entirely harmless for animals.
How does it affect dogs?
Dogs are more resistant than other species, but high doses or exposure to persin-rich parts (like leaves and skin) can still lead to:
- Stomach upset
- Vomiting
- Lethargy
Which avocado is safest?
The Hass variety—most common in grocery stores—has the lowest persin levels in its flesh. That makes it the safest choice for dogs.
The Parts of the Avocado You Should Never Feed
| Unsafe Part | Why It’s Dangerous |
| Pit | Major choking hazard; can cause intestinal blockage |
| Skin | High in persin; difficult to digest |
| Leaves & Stem | Extremely high persin levels; even small bites can be toxic |
| Guacamole or dips | Contains onions, garlic, spices—all toxic to dogs |
Emergency Tip: If your dog swallows a pit or chews the skin, contact your vet immediately. These are common causes of emergency vet visits.
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