They are attracted not just to the smell of milk, but also to their mother's own unique scent. (aboutkidshealth.ca)
These treats have a very unique scent of meat and fruits, which I kind of like since it is so different from typical dog treat smells. (beaglesandbargains.com)
Each being (dogs, humans, etc.) has his or her own unique scent. (thesprucepets.com)