He will be able to smell things that he is comfortable with, such as his mother or sleeping space, and he will associate a sense of familiarity with his new home. (k9magazine.com)
This gives a personal touch and the person will find a sense of familiarity with you. (mim-essay.com)
This combination of lack of familiarity with their surroundings and control over their surroundings tends to make travel an overall stressful experience. (riverbarkvet.com)