Doctors say John Simpson has days to live, and the Vietnam veteran has just one wish: to hold his dog one last time.

Diagnosed with pancreatic cancer in November, Simpson now lives in a hospice room in Holiday, Fla., but his rescue dog, a Chihuahua named Mr. Cutie, kept his spirits high.

"That's what I was living for," he told Fox 13.

But on Sunday Mr. Cutie went out his doggy door and dug a hole to get under the fence. He hasn’t been seen since.

Chihuahua Mr. CutieFriends posted pictures of the dog around Simpson’s home, but they haven’t had any luck locating the Chihuahua.

Simpson says he’s relying on the power of prayer and asking for the public’s help in finding Mr. Cutie.

"This is part of a project, that last honor I have to do. To make sure I get my dog back. Part of me feels like I can go in peace if that happens," he said.

Mr. Cutie was wearing a red collar, but he has no tags. He was last seen near Moog Road in Holiday. For more information, or if you have a tip, call 727-494-4059 or 727-848-8169.

Update 6/10/13: Mr. Cutie was found and returned to its owner on Friday night. Watch the emotional video below: