Yes, Orange is toxic to dogs!
Dogs accidentally consuming the Orange 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).
Orange consumption is also toxic to Cats and Horses.
Toxic Principles Of Orange: Essential oils and psoralens.
More Info About The Orange Plant
Scientific Name: Citrus sinensis
Family: Rutaceae.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.
