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Which parts of oak trees can poison a horse that eats a lot of them?

Oak buds and green acorns.

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  1. Dry oak leaves in July
  2. Oak buds and green acorns ✔
  3. Oak shade

Why: A horse has to eat a lot of buds or green acorns before it gets sick. Poisoning can hurt the kidneys and gut. Keep oak branches out of reach and fence off heavy acorn areas.

Huh, didn't know that: UMN lists feed refusal, constipation and frequent urination as signs of oak poisoning.

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What do you give a sick horse? Cough stirrup!
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References

Answer: Oak buds and green acorns. A horse has to eat a lot of buds or green acorns before it gets sick. Poisoning can hurt the kidneys and gut. Keep oak branches out of reach and fence off heavy acorn areas.

  1. Oak buds and green acorns can harm horses, UMN Extension extension.umn.edu/node/14451
    Keep oak branches out of reach of the horses and fence off areas plentiful with green acorns.
    Checked 2026-10-10.

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