National Pet Carbon Monoxide (CO) Safety Day is an annual event that raises awareness of the dangers of carbon monoxide poisoning and how it can affect our pets. The day was first recognized by Kidde on September 17, 2020, after a survey revealed that the majority of U.S. and Canadian pet owners were unable to identify symptoms of carbon monoxide poisoning in their pets. National Pet Carbon Monoxide (CO) Safety Day encourages pet owners to be aware of the risks posed by carbon monoxide and take steps to protect their furry friends from this silent killer.