Yes, Peach is toxic to dogs!
Dogs accidentally consuming the Peach 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).
Peach consumption is also toxic to Cats and Horses.
Toxic Principles Of Peach: Cyanogenic glycosides found in some species.
More Info About The Peach Plant
Scientific Name: Prunus persica
Family: Rosaceae.
Also known as: Similar plants: Plum, Apricot, Cherry.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.