Unfortunately, irises -- as well as the gladiolus species, another member of the iris family -- are toxic to all animals, including dogs, cats and even cattle. Scientists have isolated a number of toxic compounds, most notably irisin, terpenoids and quinines. read more
4. Lilies-- While lilies are well-known as a serious danger to cats, certain varieties are highly toxic to dogs as well. The peace lily, calla lily, amaryllis, lily of the valley, autumn crocus and the common houseplant, giant Dracaena or palm lily, are all deemed dangerous to dogs by the ASPCA. read more