The collective term for a canine that helps people with disabilities is an assistance dog. There are many types of assistance dogs. They are usually identified by the type of assistance they provide. Assistance dogs, like Lucky, are called service dogs. Their daily tasks might include pulling wheelchairs, opening commercial doors, answering the phone, and retrieving dropped objects.
Assistance dogs bridge the gap for wheelchair users.
This picture demonstrates Lucky completing a transaction. Dogs that assist people with hearing losses are called hearing dogs. A hearing dog alerts their handler to sounds in the environment by taking the handler to the sound source. The only exception to this is a fire alarm. Guide dogs are also under the umbrella term of assistance dog.