The relationship between humans and their pets is reaching record levels of integration and investment.
Despite their close association today, the last common ancestor of dogs and cats lived approximately 42 million years ago.
: Dogs are significantly more likely to be reunited with owners (34% for strays) than cats (only 6% for strays). 4. How to Report Issues
Pets returned to their owners decreased by 3% compared to 2024. In 2025, 638,000 dogs and cats were returned to their owners, a 3% Shelter Animals Count
as of early 2026. While often viewed as opposites, these species share a deep evolutionary and social history with humans, though their contemporary roles and needs differ significantly.
: Dogs belong to the Caniformia (dog-like) suborder, making them more closely related to bears and walruses than to cats. Cats belong to the Feliformia (cat-like) suborder, sharing more recent ancestry with hyenas and mongooses.