The neighbour described the stranger as having a solid build with medium-brown hair but only saw the back of him.
She said she not only wanted to share her story to find Snowy but she also hoped to highlight a real problem with pet theft.
"It's happening far too often and it's just not okay. It can really affect people."
She said she had found herself crying in a stranger's arms while searching for her missing loved one.
"It hurts to see people happy with their dogs. We just want her back," Young said.
So far, Young's search has included filing a police report, posting in all the Auckland Facebook community pages she can think of, scrolling Trade Me, leaving flyers in hundreds of mailboxes and pet shops, and checking every corner she could think of.
Young said Snowy had definitely been stolen as there were no scratch marks and the neighbour was adamant with what he saw.
"We had two possible sightings but nothing has been confirmed. In the seven years we have lived at that property we've had nothing like this. It's really heartbreaking."