Scientific Name: Quercus species
Family: Fagaceae
Where Found: Different varieties found in all parts of North America.
Toxicity: Toxic to Horses
Toxic Principles: Gallotannin
Clinical Signs: Poisonings can occur when horses graze on oak due to lack of adequate forage. Abdominal pain, constipation which can be followed by diarrhea (occasionally bloody), depression, frequent urination discolored urine and jaundice are all potential clinical effects.
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