13. Avocados
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Avocados contain persin, a toxin that can cause vomiting, diarrhea, and breathing difficulties in dogs. The pit is also a choking hazard and can cause intestinal blockages if swallowed.
What to Do: If your dog eats avocado flesh, monitor for symptoms and call your vet if they show signs of distress. If they swallow the pit, seek veterinary help immediately.