You can also teach a dog to find, indicate, and even retrieve an object with a specific scent. (samthedogtrainer.com)
Those behaviors can be classified into two main groups: 1 / the behaviors required for public access, like leash walking, sit, down and other basic skills and 2 / the specialized skills, like retrieving objects from the floor, turning on and off light switches, opening doors, helping a person get up from the ground, assisting in the transition of the person from a wheelchair to a bed, alerting to a change of blood glucose levels, or getting help. (medicalmutts.com)
On the next page, we'll take a look at one border collie's remarkable talent at retrieving objects of different names. (animals.howstuffworks.com)