National Lost Dog Awareness Day is observed on April 23 to support efforts in finding missing pets and reuniting them with their families. This day was established by the directors of Lost Dogs Illinois, Wisconsin, and Texas to raise awareness about the issue of lost dogs, as statistics show that every two seconds a pet in the U.S. goes missing, with a significant percentage never being reunited with their owners. Common preventive measures include ensuring homes are fenced, keeping dogs on leashes, and tagging or microchipping pets. In the event a dog goes missing, organizations like Lost Dogs of America work to help locate and return lost pets. The day emphasizes the importance of protecting pets and encourages responsible pet ownership to minimize the chances of them getting lost.