The term "shelter pet" refers to animals that are taken in and cared for by animal shelters. These animals may have been abandoned, lost or relinquished by their owners, or picked up as strays. Shelters provide a safe haven for these animals until they can be adopted into new homes. The phrase "shelter pets" is often used to describe the animals that are available for adoption from shelters and highlights the importance of rescuing and adopting animals in need.