Answer:
The dog finally trust Gordon because he saved him from the bog mud and eventually changed his perception about humans.
Step-by-step explanation:
The short story "The Wild Dog of Caucomgomoc" by Charles Boardman Hawes revolves around a wild hound and his relationship with a man. The story focuses on the hound's nature as a mysterious and dangerous creature to that of becoming man's companion.
Despite staying away from humans for a long time, the wild dog helped save the young boy, 8-year-old Ned Low. And in that one night, he would also change his perception about humans and also change the humans' perception too. And eventually, being saved from the bog mud by Gordon Low, he became a faithful and loyal companion to him till his death.
The effort of Gordon to save not only the boy from the mud but also the bloodhound seemed to make the dog realize that humans are good and trustworthy. This is evident from the lines "that night the bloodhound seemed to recognize a new bond between himself and mankind; he seemed no longer to fear the man who had raised him from the bog."