Most dogs quickly ingest human medications that are accidentally dropped on the floor. Unfortunately, many human medications are metabolized quite differently in an animal's system and become toxic. Anti-freeze in very small amounts causes kidney failure for both cats and dogs. Dogs will eat rat and mice bait like candy. Cats, on the other hand, are poisoned by eating the poisoned rats.
Organophosphates are very toxic to cats.
Fly bait and large amounts of organophosphates are toxic to dogs. Dogs have been poisoned by the zinc in pennies. Stomach acid breaks down the metal, which causes anemia and sometimes death. It affects the blood by breaking down red blood cells. Remember that our pets depend on us to take care of them and protect them from harm.