Services dogs learn new behaviors through clicker training. The owner uses a small ‘clicker’ that makes a clicking sound.
First the owner teaches the dog that ‘clicking’ is positive feedback by giving a treat with every click. Then the owner can ‘click’ the dog to shape a behavior: for example, if you want the dog to go to a certain place, say, ‘guess’ and click each time the dog turns toward the desired goal. Continue until the dog reaches the desired object/place.
A service dog needs regular training. ‘Clicking’ is good training and mental exercise for the dog.