Toxicity to pets

Fagus grandiflora, a species native to North America, is much less toxic than the European variety, Fagus sylvatica. American beechnuts are considered edible in small amounts while the European beechnut may cause GI distress, fever and mild neurologic signs. Small animals typically will have GI upset but severe toxicity is not expected. Grazing animals are at greater risk for toxicity. Clinical signs in cattle can include abdominal pain and severe neurologic signs including death due to respiratory paralysis. In horses, clinical signs include severe neurologic and musculoskeletal signs, colic, altered mentation and red gums. Death can occur due to respiratory paralysis. In horses, clinical signs include rigid leg spasms, convulsions/paddling, colic, hallucinations, dilated pupils, and red gums.