The terms get used interchangeably online, and they shouldn't be. The law treats them completely differently. Here's what actually separates a service dog, a therapy dog, and an ESA.
Service dogs: task-trained, public-access rights
A service dog is trained to perform work or tasks directly related to a person’s disability. Providing comfort through presence alone does not meet that definition.
The ADA does not require a certificate, vest or professional training program. The K-9 Handler® documents its own training and assessment; this is not government certification. See the Department of Justice resources below for access rules and exceptions.
Therapy dogs: comfort for other people, by invitation
A therapy dog is trained to comfort people other than its owner in hospitals, schools and care facilities. It does not have public-access rights the way a service dog does. Therapy teams work through national registrations such as Alliance of Therapy Dogs®, which requires a membership test and observed visits.
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Emotional support animals: comfort by presence, housing rights only
An emotional support animal provides comfort through its presence. A person with a disability may qualify for a housing accommodation; supporting information may be requested when the disability or need is not apparent. Airlines may treat ESAs as pets. See HUD and DOT guidance below.
Why the distinction matters
Understanding the distinction helps you choose an appropriate training goal. If you need everyday manners, task training or preparation for therapy visits, ask Ira which program fits. Use the official resources below for access, housing and travel requirements.
About the author
Ira Smith
Owner & Certified Professional Dog Trainer
USAF veteran dog handler, training dogs since 1974, 52+ years. AKC evaluator and S.T.A.R. Puppy instructor, Alliance of Therapy Dogs national tester, IAADP provider member.
