Every year, more than 10,000 cats and dogs die from antifreeze poisoning. The danger exists all year, but fall is especially dangerous because it’s when many people flush their cars’ coolant systems. Antifreeze is not only lethal for pets, but for humans we well, and that sweet smell and taste could be tempting for children – so always use caution.

Antifreeze contains ethylene glycol, a chemical that is highly toxic. Ethylene glycol has a sweet smell and taste, which attracts pets and increases the risk that even a small amount leaked from your car or spilled during flushing or refilling, can be fatal. For a cat, as little as one teaspoon can be lethal.

When changing the antifreeze in your radiator, don’t leave the open container unattended for even a moment. Wash any spills from your driveway immediately. Routinely check underneath your cat for signs of leaks.

Signs of ethylene glycol poisoning can mimic other illnesses, but usually the initial symptom will be that your cat appears drunk. After this initial stage, the cat will seem to recover. You may think the danger is over, but in fact, during this stage, the poison is reaching the liver and kidneys, where it metabolizes into a lethal substance. If you suspect your cat has ingested antifreeze, seek immediate veterinary assistance. If treated immediately, before the substance reaches the liver and kidneys, your cat’s chances of recovery are increased.

There are antifreeze products available that contain a less lethal substance called propylene glycol. Although these products contain the less lethal chemical, propylene glycol is still toxic, so exercise the same caution when using this kind of antifreeze.

For more information refer to the book Think Like a Cat.

© 2009 Cat Behavior Associates, LLC