Pet owners are pretty savvy these days, and thanks to the internet, information about pet health and toxins is pretty widely available. There's a heap of bad information, too, so be careful what you read and check your sources. Most pet owners in-the-know are aware of antifreeze, chocolate, and rat poison, and know about several other possible toxins that can affect pets like human prescription and over the counter medications. Despite this, there are a few items that are found in most homes that can be toxic to pets, and I'm always surprised that more people aren't aware of them. I've treated patients poisoned with each one of these substances, so the threat is very real.