Unfortunately, many pets get into toxins — even toxins that were meant to get rid of pests like mice and rats. An extremely common type of toxicity is rodenticide, or rat poison. There are three main groups of rat poison used, and they can all be very toxic to dogs and cats (and even our exotic pets, too).
Patients that usually have the best prognosis from this type of toxicity are those that are actually seen eating the rat poison by their owners, who then bring them in for treatment right away.