Small breeds in this line of work tend to be misunderstood. Here is more information on small breeds and their place in service work.

More about small breed SD

Small breed service dogs are given the same access rights as large breed service dogs. You will see them everywhere; stores, restaurants, planes, public transport.
The answer to this is YES! They are allowed to be in purses and carried. However, small breed service dogs are NOT permitted in carts or on public seating just like large breed dogs.
Any kind you can think of except for mobility! Any mobility work with dogs smaller than large breed is dangerous on their hips and joints.
YES! Small breed service dogs are trained to the same caliber as large breed dogs. If you see ANY size dog being disruptive in public and unable to be controlled, it is NOT a service dog and should not be in that area.