"I think he was just a dog who needed something to do, and now he has found his calling he is away," she said.
Initial scent association training would take eight weeks, followed by operational training.
Ms Williams also had the highest of praise for Devon Robinson and his family, who had not only taken Kai in when they found him in Reed Park in Kaikohe, and were unable to find his owner, but had made the decision that he needed a more rewarding life than they would be able to give him.
"That speaks volumes about the kind of people this family are," she said.
"They could have had him put down but they didn't, and they must have been tempted to keep him but knew that he deserved better."
The cattle dog-cross that she described as "stunning, absolutely lovely," was about six weeks old when the Robinsons found him. No one seemed to want him, no one had reported him missing to the pound, the SPCA or the local vets, so they kept him, until his owner turned up. No one ever did, "so we adopted him and loved him," Toni Robinson said.
Some six months later, having decided that their four-legged friend needed more than they could give him as a pet, she advertised him on Trade Me, where he caught the eye of Janet Williams. The rest, as they say, is history.