Origin of sled dog
Examples from the Web for sled dog
She used to have a business here as a sled-dog trainer, but she closed it down after her son was taken captive.
Toward the last of October when the snow began to make deep, Fleur's education as a sled-dog began.The Whelps of the Wolf|George Marsh
It is the law of the sled-dog that you shall not steal your trace-mates' grub.
Jan, the perfect exemplar of sled-dog discipline, apparently defied him.
I don't know who did train him, if anybody ever did; but as a leadin' sled-dog he's got all the Yukon whipped to a standstill.