Which general information supports this hook and thesis statement?

Hook: In the hazardous rubble of a catastrophic earthquake or the blazing landscape of an outback wildfire, who is called upon for help when humans can't intervene?

Thesis: Rescue dogs share the desire to assist those in need, but it is not always humans on the receiving end of a helping paw.

Approximately 72 percent of rescue dogs have been formally trained to help where needed.
From the time they are 16 weeks old, lifesaving canines receive in-depth training to prepare them for a variety of serious situations.
Studies show that all animals are born with the desire to save lives, but not all use those abilities.
While I favor animals that rescue humans at risk, those that save other animals are good too.