Yes, Buckwheat is toxic to dogs!
Dogs accidentally consuming the Buckwheat plants can show the following clinical symptoms: Vomiting, Prolonged Depression, Incoordination, Hypersalivaton, Sleepiness Or Excitation, Dilated Pupils, Low Body Temperature, Low Blood Pressure, Coma, Seizure And Death (In Rare Cases).
Buckwheat consumption is also toxic to Cats and Horses.
Toxic Principles Of Buckwheat: Fagopyrin.
More Info About The Buckwheat Plant
Scientific Name: Fagopyrum spp.
Family: Polygonaceae.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.
