It does seem to be fairly well known in the US that many plants can be toxic to pets, although a "refresher" seems to come around about every three or four years when people begin to forget that they need to be careful. Fifty years ago or so, before there where "pet vets," many people kept a handbook or two on animal illnesses, along the lines of the "Home Medical Guide" but for critters. In a good one, almost two-thirds of the text would likely be about plant toxicities - and the rest mostly about worms and other creepy-crawlies (internal and external).

Almost any of the lily stuff is potentially toxic, to pets and to humans. Humans are supposed to know not to gnaw on them; but a couple of varieties are reputed to have halucinogenic properties, so occasionaly some nut feels compelled to try them out. Unfortunately, the hallucinogenic ones look almost exactly like a couple that are deadly poisonous, so we loose a few "hippies(?)" every few years.

Warnings also quite often include the poinsettia as hazardous to pets, although there does seem to be some uncertainty about them. Some common varieties of philodendron have been blamed for pet illness, particularly of cats, again with some disagreement among the experts.

Almost any seeds, or fruits/pomes that contain seeds should be suspect, and kept away from pets (and children!), since quite a number of plant seeds contain strychnine-like compounds. (It's supposedly a natural defense against bugs that might eat the seeds?)

Along with other suggestions about protecting your pets, providing them with adquate access to some safe herbiage to gnaw on may be a help. Pet stores in the US often sell "pet planters" that they claim will "grow veggies" for your kitties - although ours are in-and-out cats and seem to prefer the crabgrass. Assuming the decorative plants are in dirt, keeping the soil inaccessible helps keep cats, especially, from being interested. A new pot of fresh soil of remarkably small size looks like a freshly sanitized port-a-potty to some cats, and they can hardly resist poking around in it a bit.

John