Yes, Daisy is toxic to dogs!
Dogs accidentally consuming the 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).
Daisy consumption is also toxic to Cats.
Toxic Principles Of Daisy: Sesquiterpene, lactones, pyrethrins and other potential irritants.
More Info About The Daisy Plant
Scientific Name: Chrysanthemum species
Family: Compositae.
Also known as: Chrysanthemum, Mum.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.