Every year, Second Chance Humane Society and other animal welfare organizations warn about the negative impact of July 4th fireworks on pets. More pets go missing on Independence Day than on any other day. Shelters see numerous frightened dogs and cats who have escaped due to the loud noises and strange smells of fireworks. Those that end up in shelters are the fortunate ones; others may be hit by cars, remain lost, or get injured while trying to escape.