Lizzy and Elise struggle to rescue a stray on the train tracks near the Villalobos warehouse. Mariah enlists help to get to the bottom of her dog Tater's nagging pain. A senior dog with a long medical history finally has her shot at a forever home.

Lizzy tries to track down the owner of a dog tied up outside the rescue. An older couple comes looking for their first dog, but their choice requires special temperament testing. And, when a dog develops allergies, Mariah looks for a natural cure.