Heartworms are large worms that live in the hearts of dogs and cats. Dogs are the most common hosts for this parasite. Heartworms are also known as Dirofilaria Immitus. The adult heartworm lives in the right chamber of the heart and pulmonary artery which routes blood through the lungs where carbon dioxide is removed and oxygen is added to the red blood cells. Heartworms can cause significant damage and even death.

Every year more than ten thousand dogs and cats are accidentally poisoned with automotive antifreeze. This is the most common cause of poisoning of dogs and cats in the U.S. The toxic ingredient in antifreeze, ethylene glycol, is also it's major component. It makes up 95 per cent of the product, therefore, it only takes a small amount of antifreeze to poison a dog or cat. One or two teaspoons full of antifreeze will poison a cat and three tablespoons is enough to kill a medium size dog. Ethylene glycol is sweet and quite tasty to dogs and cats and they will actively seek it out.