On: Save the dog from a 70m deep, 35cm wide hole

[stevesearer]

It reminds me of The Crow and the Pitcher from Aesop's Fables: https://en.wikipedia.org/wiki/The_Crow_and_the_Pitcher

Without knowing the total parameters of what is possible and not possible, perhaps they could slowly lower buckets of dirt and rocks to the bottom in a way where the dog could just remain standing on the top of the pile.