Is Bull Pine Toxic to Dogs and Cats? (2026)
Pinus ponderosa
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Quick facts
| Toxic to dogs | No |
|---|---|
| Toxic to cats | No |
| Toxic to horses | Yes |
| Toxic component | Isocupressic acid (an abortifacient compound, not a GI or organ toxin) |
| Onset of symptoms | Days to weeks of grazing exposure during pregnancy — not a single-exposure risk |
| Indoor / outdoor | outdoor |
If your pet ate this plant
Both lines are staffed 24/7. A consultation fee applies to each. Do not wait for symptoms to appear before calling.
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Symptoms in horses
- Abortion in pregnant mares (typically in the third trimester)
- Weak or premature foals in mares that carry to term
- Retained placenta
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What to do
This is a pregnancy-specific risk for horses ("pine needle abortion"), not a general toxicity — pregnant mares should be kept away from Ponderosa Pine needles, especially in late gestation. Not a concern for non-pregnant horses, dogs, or cats.
Toxic component and mechanism
The toxic component in Bull Pine is isocupressic acid (an abortifacient compound, not a gi or organ toxin).
What makes this plant different
Ponderosa Pine is a rare case on this site where the danger is entirely reproductive rather than a general poison — dogs and cats show no toxic reaction at all, and even horses are only at risk if pregnant. This is sometimes called "pine needle abortion" in veterinary literature and is a genuine concern for ranches and pastures where pregnant mares have access to fallen needles, especially after storms bring down fresh branches.
Plant identification
- Scientific name
- Pinus ponderosa
- Family
- Pinaceae
- Also known as
- Bull Pine, Ponderosa Pine, Western Yellow Pine, Yellow Pine, Blackjack Pine
- Typically found
- outdoor
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Last verified: July 2, 2026 · Cross-referenced with ASPCA Animal Poison Control