Tilla, one of my dogs, will often “nudge” you lightly when he comes in from the yard. He will tap you lightly with his nose as if to say, “I am glad to see you again.” He is the only dog of our three to do that. Coco, his sister, sometimes will “mouth” you in her excitement if she has not seen you for awhile. She does not bite. The two greet me differently. Each dog, each pet, is an individual and has their own personality.