Zander, a white samoyed-husky mix, navigated two miles of tricky neighborhoods and across a busy highway to find his owner who was in the hospital, and now he's not leaving his side.
As John Dolan lay in his hospital bed at the Good Samaritan Medical Center in Islip, N.Y., Sept. 27, he got a phone call from a hospital employee that he had to come get his dog. One problem, Dolan was inside the hospital and his wife, Priscilla, was asleep at home.
When Zander and Dolan were finally reunited, they couldn't be happier.
"He's my boy. He's been glued to me ever since," Dolan told "Good Morning America" today.
Dolan called his wife last Thursday to tell her to come get Zander outside the hospital. She didn't know he was missing until she got the call.
"We couldn't believe it. I was sleeping and I was like, 'Oh my God, what is he doing there?'" Priscilla Dolan told "GMA."
While Dolan was in the hospital he was very sad and moping around the house, Priscilla Dolan said. He was missing his best friend.
"He sleeps right next to John and John walks him a lot," Priscilla Dolan said.
Zander is a 70-pound, approximately 7-year-old samoyed-husky mix that Dolan and his wife had rescued from a shelter five years ago who has a history of escaping. The hospital isn't in the direction that he's gone before, so the Dolans aren't sure where he was heading this time.
"Was he on his way to Hollywood? I don't know," John Dolan joked.
ABC News' Jennifer Abbey contributed to this report.