The ASPCA keeps a database on plants toxic to pets/animals, and does indicate that Hemerocallis is toxic to cats (liver failure, which can be fatal) and cows, and not toxic to dogs. But, the same entry claims the Family for hemerocallis is the lily family "Liliaceae" which is not correct. Betty must be right that it is just Asiatic lilies that are toxic to cats. Unfortunately, it looks like the Animal Poison Control Center/ASPCA has it confused and mixed together - since lilies and daylilies are not from the same family at all, as it would appear from their "Day-Lilies" entry.
http://www.aspca.org/Pet-care/...
Perhaps this is one source of confusion that vets and owners find who reference that site, or others who disseminate their information to base alerts upon? Once the survey results are known, it might be a good place to contact and update.
