Do most dogs treat people based on their physical apparence?

(06-06-2012, 06:46 AM)Melody_Of_Rain Wrote: I don't know if they judge people based on appearance but they seem to be able to tell sexes apart. My grandmother used to have a dog that was terrified of men she was a rescue dog so it was assumed she's had bad experiences with men in her past.

Yes, they can tell whether it's a man or a woman. Maybe by appearance, maybe by the smell, I am not sure.