Since 18-year-old Elizabeth was paired with her dog Bella, she's had fewer emergencies and fewer hospital trips from her disability. "Bella holds Elizabeth's life in her service," said Pam Macdade, Elizabeth's mother.Elizabeth was born with cerebral palsy. She's nonverbal and bound to a wheelchair. "We have reached as far as we could go with medications and surgeries," Pam Macdade said. "We had to start thinking outside the box."This led them to Bella, a service dog. Elizabeth also suffers from a rare form of epilepsy called west syndrome."It's not anything we can pinpoint or predict," Pam Macdade said. "I needed Bella to be able to sense the seizure before it came on so I could give Elizabeth rescue meds."Watch the video above for the full story.