Nicky said later she knew she would have to "bond" quickly with Slip to avoid another fall from the ledge which was no more than 40cm wide.
She used a water bottle from the fire truck to quench the trembling dog's thirst as she reached him and placed him in the sling.
"He was shaking and looking skinny," said Nicky, who had done a similar job in a rescue near Raupunga several years ago. "He wasn't going anywhere, but I think he knew he was being rescued."
She said it was quite a way down if Slip had fallen further, and it was possible he was too scared to even bark because he could fall again.
Slip was soon back home, sleeping but appearing little the worse for the ordeal, as Sally praised the Fire Service's two crews totalling eight staff.
"It was incredible, they were amazing."