DCHP-1 Online
pack dog 
a dog trained to carry a pack or other burden strapped to his back.
See also: pack-carrying dog packer (def. 3)
- 1775 The Rivers that Water their Country have no communication with Churchill river for which reason it reduces them to the necessity of bringing their bundles on their backs and the Dogs are loaded like packhorses.]
- 1913 Besides the cart and the travois, pack-ponies were also used; also pack dogs, the latter bearing frequently burdens mountains high in comparison with their size. These also are still in everyday use amongst the Indians of the woods.
- 1955 He could use him on this trap line as a pack dog.
- 1775 The Rivers that Water their Country have no communication with Churchill river for which reason it reduces them to the necessity of bringing their bundles on their backs and the Dogs are loaded like packhorses.]