Last updated: 24 August 2026
These two get used interchangeably, and they are not remotely the same thing.
The quickest way to tell them apart isn’t training or breed or vest color. It’s this: who is the dog working for?
A service dog works for one disabled person — its handler. An emotional support animal lives with one person, for that person. A therapy dog works for strangers — the patients, residents and students it visits, none of whom it lives with.
That single question sorts almost every case, and everything else follows from it.
The four categories, side by side
There are four, not two. Most confusion comes from the two nobody explains.
| Who it’s for | Public access | Training | Certification | |
|---|---|---|---|---|
| Service dog | Its disabled handler | Yes — ADA | Trained to do specific tasks | None exists. Anyone selling it is selling paper. |
| Emotional support animal | Its owner | No | None required | A letter from a treating professional |
| Therapy dog | Other people | No | Temperament + handler training | Real, required, and from a nonprofit |
| Facility dog | An institution’s clients | Site-specific | Professionally trained | Placed by an accredited program |
Look at the last column. Two of these four involve certification that means something. Two involve certification that doesn’t exist. Getting that backwards is where people lose money or get turned away, and it’s the whole reason this page exists.
Service dog
A service dog is a dog — under the ADA, only dogs qualify, with one narrow separate provision for miniature horses — individually trained to perform work or tasks for a person with a disability.
The task is the whole definition. Pulling a wheelchair. Alerting to a seizure. Retrieving medication. Interrupting a nightmare. Guiding someone who can’t see. A dog whose only function is comfort does not meet the standard, no matter how much good it does its owner.
What it gets: the dog goes where the public goes. Shops, restaurants, government offices, hospitals, transport. Staff may ask only two questions — is the dog required because of a disability, and what work or task has it been trained to perform. They may not ask what your disability is, demand documentation, or require a demonstration.
Any breed, any size. No registration. No certification. No professional training program required — you may train the dog yourself.
Whether you’d qualify at all is covered in do I qualify for a service dog, and the rules in detail are in ADA service dog laws.
Emotional support animal
An ESA lives with you because a licensed professional who treats you has determined that it helps with a disability. No training is required, and it doesn’t have to be a dog.
What it gets: housing consideration, and that changed in 2026 — HUD’s enforcement office moved to a training-based standard in May, though the Fair Housing Act itself did not change. It gets nothing in public. No shops, no restaurants, no airline cabin as a service animal since 2021.
There’s a whole cluster on this: what disabilities qualify, what the letter actually does, and choosing the animal.
The most common mix-up on this site: people who describe an ESA are often describing a service dog without realizing it. If the dog could be trained to do something specific — fetch medication, apply pressure during a panic attack, wake you from a nightmare, get you out of a crowd — that’s a service dog, and it comes with far stronger rights.
Therapy dog — the one nobody explains properly
A therapy dog belongs to a handler and goes with that handler to visit other people. Hospitals, nursing homes, schools, libraries, hospices, courthouses, disaster response.
The dog is not there for its owner. It’s there for strangers.
That inverts the whole model. A service dog is trained to focus on one person and ignore everyone else. A therapy dog has the opposite job — it has to want contact with people it has never met, in an unfamiliar building, while somebody unpredictable reaches for it.
What therapy dogs actually do
“Visiting” undersells it. The work is more varied than most people realize, and the settings shape what the dog needs to be.
Hospitals. Patient rooms, oncology units, pediatric wards, rehabilitation floors. Often the dog is there for somebody who has been in a building for weeks and hasn’t touched anything living.
Nursing homes and memory care. The dog frequently reaches people that conversation no longer reaches. Handlers who do this work will tell you about residents who don’t speak to staff and speak to the dog.
Schools and libraries — reading programs. A child who stumbles reading aloud to a class will read to a dog for twenty minutes without embarrassment, because the dog doesn’t correct anyone. It’s one of the most established uses there is.
Courthouses. Supporting a child or a vulnerable witness through testimony or an interview.
Hospice and palliative care. Including sitting with families, not only patients.
Universities during exam periods, and crisis and disaster response after a shooting, a flood, a fire.
What the visit itself looks like is usually quieter than people expect. The handler manages the room, watches the dog for signs it’s had enough, and keeps sessions short. Most programs cap a visit at an hour or two, because a dog concentrating on strangers in a strange building is working hard even when it looks like it’s lying down being admired.
The part that surprises people: no public access rights
A therapy dog has no more right to enter a store than any other pet. None. The ADA covers service animals, and therapy dogs are explicitly not service animals.
What a therapy dog has is an invitation. A facility agrees to a visiting program, sets its own rules, and the team comes in under those rules. The certification isn’t a passport — it’s what the facility requires before it will let you through the door.
Take a certified therapy dog to a restaurant and you’re taking a pet to a restaurant. The vest doesn’t change that, and staff who turn you away are correct.
Certification here is real — and this is the part I have to be careful about
This site tells you repeatedly that service dog registration and certification are a scam. That’s true. There is no registry in the ADA, the certificates are worthless, and the people selling them are making money from disabled people who don’t know better. I’ve written about it at length in how to identify a fake service dog.
Do not carry that across to therapy dogs.
Therapy dog certification is legitimate, it is required by the facilities you’d want to visit, and it comes with liability insurance you genuinely need when your dog is on a ward. It’s the exception, and I’d rather say so plainly than have somebody dismiss the real thing because of what I’ve said about the fake one.
How to tell them apart in three seconds:
- Selling you a service dog certificate? There is nothing to certify. It’s paper.
- A nonprofit asking you to pass an evaluation, submit veterinary records, complete a handler course, undergo a background check and then log visits? That’s the real thing, and it’s work, not a purchase.
The tell is which direction the effort runs. A scam sells you a document. A certifying body makes you earn one.
Two of the established organizations are Pet Partners and the Alliance of Therapy Dogs. And worth knowing: the American Kennel Club does not certify therapy dogs — its own page says so, in those words. What the AKC awards is a title for visits you’ve already made, once your dog is certified by somebody else.
What a therapy dog actually has to be
The standard Pet Partners applies is the best single sentence on the subject. The animal must:
“welcome, not merely tolerate, interactions with strangers.”
That’s the whole test, and it rules out a great many lovely, well-behaved, obedient dogs. Tolerating a stranger’s hands is not the same as wanting them. A dog that endures a visit politely is being asked to do something unkind.
Also worth knowing: therapy animals aren’t only dogs. Pet Partners registers nine species, including cats, horses, rabbits, birds, miniature pigs, llamas and alpacas. Service animal law says dogs. Therapy work doesn’t.
Facility dog — the fourth one
Briefly, because it comes up and nothing else on this site covers it.
A facility dog is professionally trained and placed with a staff member inside an institution — a courthouse, a children’s hospital, a residential program. It works there full time with the people that facility serves.
It isn’t a service dog (it doesn’t work for one disabled handler) and it isn’t quite a therapy dog (it isn’t a volunteer visiting). It’s a working animal on a payroll, and it’s usually placed by an accredited program.
What I’ve seen, and what I haven’t
Straight answer: I’m a service dog handler, not a therapy dog handler. Twelve years with my own dog, and no experience running a therapy team. I’m not going to pretend otherwise on a page about somebody else’s specialty.
What I have is what I’ve seen in VA hospitals and nursing homes, and questions I’ve put to the handlers while I was there. Two things stood out both times.
Those dogs are immaculate. Not tidy — immaculate. I asked a handler about it and she explained that the dogs are bathed and groomed before every visit, because of patient allergies, injuries and open wounds.
She was describing a written rule. Pet Partners requires that therapy animals be bathed or cleaned no more than 24 hours before a visit, with attention to eyes, ears, nose, feet and under the tail. Nails trimmed before every visit so they can’t scratch a patient. Hands washed before and after contact. A dog with any wound or broken skin doesn’t visit at all. Raw diets are prohibited. A clean barrier goes between the animal and anyone it sits with. Equipment is disinfected between visits.
There’s clinical guidance behind this — the Society for Healthcare Epidemiology of America published recommendations on animals in healthcare facilities, written for infection control staff. This isn’t fussiness. It’s the reason a hospital lets animals in at all.
And the dogs chose the patients. Almost every one of them worked the room on its own initiative — moving toward particular people, settling with them, not being walked bed to bed by a handler.
I didn’t know at the time that I was watching the certification standard. That’s what “welcome, not merely tolerate” looks like when it’s real.
What each one asks of you
Worth seeing side by side, because the three routes are nothing like equivalent in effort.
A service dog is the biggest undertaking on this page by a distance. Two years minimum if you’re owner-training, because the dog has to be task-trained and reliable in public before it’s any use to you. A program dog from an accredited nonprofit is usually donated rather than sold, but waits commonly run two to five years. Either way you’re changing how you live.
An emotional support animal asks least: an existing relationship with a licensed professional who treats you, and their assessment. No training, no evaluation, and — since 2026 — considerably weaker housing protection than it used to carry.
A therapy dog sits in between, and it’s the one most people underestimate in a specific way. The certification itself isn’t years of work: veterinary records, a handler course, an evaluation, a background check, and observed visits, usually completed over a few months at a cost in the low hundreds. What it asks for is ongoing commitment. Certifications lapse if you stop visiting — some organizations require a logged visit every few months to stay active. It’s volunteering, and volunteering has a schedule.
And the thing that can’t be worked around: for the first two, you can train a dog into the role. For therapy work, the dog either wants strangers or it doesn’t. That’s temperament, and no amount of training installs it.
Which one do you actually need
You want a dog that helps you with a disability, in public. That’s a service dog. Start at do I qualify for a service dog.
You want your dog with you at home, and your condition is mental health related. That’s an ESA — but read the task question first, because a lot of people describing an ESA are describing a service dog.
You have a friendly, steady dog and you want to do some good with it. That’s therapy work, and it’s the one route on this page that’s genuinely open to almost anybody with the right dog and the time. Getting a therapy dog certified covers the process.
Somebody has told you that you need a certificate. For a service dog, they’re wrong and probably selling. For a therapy dog, they’re right. Check which one you’re being sold.
Frequently asked questions
What is the difference between a service dog and a therapy dog?
A service dog is individually trained to perform tasks for one disabled handler and has public access rights under the ADA. A therapy dog belongs to a handler and visits other people — patients, residents, students — in facilities that have invited them, and has no public access rights at all. The simplest test is who the dog is working for: its own handler, or strangers.
Do therapy dogs have public access rights?
No. Therapy dogs are not service animals under the ADA and have no more right to enter a business than any other pet. They work by invitation from specific facilities, under those facilities’ rules. A therapy dog in a restaurant is a pet in a restaurant, and staff are entitled to say so.
Is a therapy dog the same as an emotional support animal?
No, and this is a common mix-up. An emotional support animal lives with one person and exists for that person’s benefit. A therapy dog visits other people and exists for their benefit. An ESA needs a letter from a treating professional; a therapy dog needs certification from a therapy dog organization.
Does a therapy dog need to be certified?
Yes, in practice. Facilities require it before they will admit a visiting team, and the certification carries liability insurance. This is the opposite of service dogs, where no legitimate certification exists at all. Established organizations include Pet Partners and the Alliance of Therapy Dogs. The AKC does not certify therapy dogs — it awards titles for visits already completed.
Can any friendly dog be a therapy dog?
Not quite. The standard is that the animal must welcome, not merely tolerate, interactions with strangers. Many obedient, well-mannered dogs politely endure being handled by people they don’t know, and asking those dogs to do visiting work is unkind. Certification also requires health screening, a handler course, an evaluation, and a background check for the handler.
What are the health rules for a therapy dog?
Strict ones. Pet Partners requires the animal be bathed or cleaned no more than 24 hours before a visit, nails trimmed before each visit, and no visiting at all if the animal has any wound or broken skin. Raw meat diets are prohibited, barriers are used between the animal and clients, and equipment is disinfected between visits. These are infection control requirements, and they’re why facilities allow animals in.
Can a therapy dog be something other than a dog?
Yes. Unlike service animal law, which recognizes only dogs, therapy animal programs register multiple species. Pet Partners registers dogs, cats, horses, rabbits, guinea pigs, rats, birds, miniature pigs, llamas and alpacas.
What is a facility dog?
A facility dog is professionally trained and placed with a staff member inside an institution — a courthouse, children’s hospital or residential program — where it works with the people that facility serves. It is not a service dog, because it does not work for one disabled handler, and not quite a therapy dog, because it is not a volunteer visiting from outside.
I’m a service dog handler of twelve years. I’m not a therapy dog handler, and this page says so where it matters. The legal statements come from the ADA and the Department of Justice’s guidance; the therapy dog requirements come from Pet Partners, the Alliance of Therapy Dogs and the AKC’s own program rules, all linked above. Pet Partners and the Alliance of Therapy Dogs both charge fees for the certification they provide — I’ve named them because they are the organizations that actually do this work, not because anyone paid for the mention. If something here is wrong, particularly if you run a therapy team and I’ve got a detail off, tell me and I’ll fix it and note that I did.