No

“There is a patience of the wild – dogged, tireless, persistent as life itself.”
― Jack London, The Call of the Wild

“He must master or be mastered; while to show mercy was a weakness. Mercy did not exist in the primordial life. It was misunderstood for fear, and such misunderstandings made for death. Kill or be killed, eat or be eaten. was the law; and this mandate, down out of the depths of Time, he obeyed.”
― Jack London, The Call of the Wild

“He pleaded with his eyes to remain there. The driver was perplexed. His comrades talked of how a dog could break its heart through being denied the work that killed it, and recalled instances they had known, where dogs, too old for the toil, or injured, had died because they were cut out of the traces. Also, they held it a mercy, since Dave was to die anyway, that he should die in the traces, heart-easy and content. So he was harnessed in again, and proudly he pulled as of old, though more than once he cried out involuntarily from the bite of his inward hurt. Several times he fell down and was dragged in the traces, and once the sled ran upon him so that he limped thereafter in one of his hind legs.”
― Jack London, The Call of the Wild

“John Thornton stood over Buck, struggling to control himself, too convulsed with rage to speak. "If you strike that dog again, I'll kill you," he at last managed to say in a choking voice.”
― Jack London, The Call of the Wild