Yes, Showy Daisy is toxic to dogs!
Dogs accidentally consuming the Showy Daisy 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).
Showy Daisy consumption is also toxic to Cats and Horses.
Toxic Principles Of Showy Daisy: Unknown.
More Info About The Showy Daisy Plant
Scientific Name: Erigeron speciosus
Family: Asteraceae.
Also known as: Seaside Daisy, Horseweed, Fleabane.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.