Yes, Bleeding Heart can be toxic to dogs.
Scientific Name: Dicenta
Additional Common Names: Dutchman’s Breeches, Turkey-corn, Pacific Bleeding-heart, Few-flowered Bleeding-heart, Komakusa, Steer’s-head.
Toxic Principle: Alkaloids
Poisoning Symptoms: When consume the plant show signs of anorexia, depression, diarrhea, colic, weakness, and cardiac arrhythmia. Symptoms usually occur about 1 hour following consumption animals may become comatose and die.
Additional Info
A perennial herbaceous plant in the fumitory family with small yellow clustered bulb-lets, smooth finely dissected leaves, that are blue grey and fern like in appearance and dainty white heart-shaped flowers, broad hearts; pinkish-white, sometimes tinged with pale lavender; and fragrant. The overall height is 6-10 in.