Is Shasta daisy toxic to cats?

Mildly. The ASPCA lists shasta daisy as mildly toxic to cats — a chewing cat typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. The ASPCA lists daisies (Leucanthemum / Chrysanthemum family) as toxic to dogs and cats. Toxic principles include sesquiterpene lactones, pyrethrins, and other Asteraceae-family compounds that can cause vomiting, diarrhoea, hypersalivation, and skin irritation. Toxicity is mild to moderate; clinical signs are rarely severe.

The ASPCA lists daisies (Leucanthemum / Chrysanthemum family) as toxic to dogs and cats. Toxic principles include sesquiterpene lactones, pyrethrins, and other Asteraceae-family compounds that can cause vomiting, diarrhoea, hypersalivation, and skin irritation. Toxicity is mild to moderate; clinical signs are rarely severe. Signs usually appear soon after chewing rather than hours later — watch for drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy after your cat has had access to shasta daisy.

Stay calm. Remove any plant from your cat's mouth and take the plant away. Note how much was eaten and when, and do not induce vomiting unless told to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice; a leaf or photo helps the vet treat it correctly.

The ASPCA classification Growli uses applies to both cats and dogs: Shasta daisy is mildly toxic to dogs as well. See the full shasta daisy pet-safety guide for both species.

For a similar look without the risk, see the best cats-safe plants list — every plant there is ASPCA non-toxic to cats and dogs.