Just told my dogs (both senior citizens) that they can't have any more chocolate. They are packing up to leave. Poisonous plants listed in my horticultural guide include Anthurium, cyclamen, Dieffenbachia (iritates throat if you eat it), leaves of English ivy, Euphorbias including Poinsettia and crown of thorns, Hydrangea, Lantana, Mistletoe, Oleander, monkshood (Aconitum), castor bean, foxglove (Digitalis), sweetpea and buffalo been seeds, etc. etc. Of course tolerances vary and not all animals are affected. Poinsettia sap doesn't affect my skin but I know one greenhouse worker who has to wear gloves during the annual task of starting thousands of plants for Christmas sale.