No, not without asking the handler first, and most of the time the answer will be no. A service dog is working, and its job depends on paying attention to its person, not to you. The kind thing to do is ignore the dog, smile at the human, and carry on. If you really want to say hello, ask the handler, not the dog, and take any answer gracefully.
Why you shouldn't pet a service dog
Because it is at work. The law defines a service dog by its job: a dog "individually trained to do work or perform tasks" for a person with a disability. Some of those jobs are easy to see, like guiding someone who is blind. Many are not. The Department of Justice's own examples include a dog that alerts its handler when blood sugar goes too high or too low, a dog that reminds someone to take their medication, and a dog "trained to detect the onset of a seizure and then help the person remain safe during the seizure."
Now picture that dog while a stranger rubs its ears and talks to it in a baby voice. It is looking at the stranger, not the person it is there to protect. One pat seems harmless, but a handler can get the same from stranger after stranger on a single trip to the grocery store, and each one pulls the dog off its job and costs the handler time and attention too.
There is a quieter reason as well. You cannot tell from looking at someone why they have a service dog. As Atlas Assistance Dogs puts it, "not all disabilities are visible." The person who looks perfectly fine may be relying on that dog in a way you would never guess.
What to do instead
This is easier than it sounds, and it is the part most guides skip:
- Treat the dog like a piece of equipment you have been asked not to touch. No petting, no eye contact games, no whistling, kissy noises or calling its name. The Guide Dog Foundation for the Blind asks people not to "touch, talk, feed or otherwise distract the dog while he is wearing his harness or vest."
- Be friendly to the person. A smile, a hello, a normal conversation. "Speak to the handler, not the dog."
- Never offer food. Not a crumb, not a treat from your pocket. The Guide Dog Foundation says, "Never give the dog table scraps."
- Give the team room. Do not crowd them in a line or block their path, and if you have a dog of your own, keep it well back.
- Admire from a distance. It is fine to think "what a good dog." You can even say it to the handler. That is a compliment, not a distraction.
If you ask and the handler says yes
Some handlers are happy to let people say hello when the dog is settled or off duty. If you get a yes:
- Let the handler release the dog to you. Do not give it commands yourself; the Guide Dog Foundation asks that you "allow the handler to do so."
- Be calm and brief. Their advice: "don't pat the dog on the head; stroke the dog on the shoulder area."
- Stop the moment the handler asks you to, even mid-stroke, and do not take it personally. The dog may be needed right then.
And if the answer is no, that is the whole answer. "No problem, have a good day" is the perfect reply. A handler does not owe you a reason, and they certainly do not owe you an explanation of their health.
Can you pet a service dog in training?
Ask first, the same as with a working dog. A dog in training is learning to ignore exactly this kind of attention, and every stranger who greets it without permission makes that lesson harder. Some trainers practice polite greetings on purpose (the AKC Canine Good Citizen test includes "sitting politely for petting"), so they may say yes on their terms. Let them decide. Look for vests or bandanas that say "in training"; see service dogs in training for what those dogs are allowed to do.
Can you pet a psychiatric service dog?
Same answer. A psychiatric service dog is a service dog, trained to do tasks such as interrupting a panic attack or waking its handler from a nightmare. Because the handler's disability often cannot be seen, strangers sometimes treat the dog as a pet or ask "is that a real service dog?" Please skip both. More in psychiatric service dogs.
Emotional support dogs and dogs in "do not pet" gear
An emotional support animal is not a service dog under the ADA, because comfort is not a trained task. But that does not make it a free-for-all. Plenty of dogs wear a "do not pet" vest, patch or leash for good reasons that have nothing to do with the law: they are nervous around strangers, reactive to hands reaching over their heads, recovering from surgery, old and sore, or still in training.
So the rule is simple: whatever the dog is, if the gear says do not pet, do not pet. The owner is telling you what their dog needs. If you are that owner and want the message to be clear before anyone reaches, a Do Not Pet vest says it for you. Our guide to do not pet vests explains what the words mean and what they do not.
What "do not pet" on a vest means
It means exactly what it says: please do not touch this dog. It is a request from the owner, not a legal status. A "do not pet" vest does not tell you whether the dog is a service dog, and it does not give a pet the right to go anywhere pets are not allowed. It is still worth respecting every time.
What it does not mean is that you should ask the owner to prove anything. Only a business deciding whether to admit a dog may ask the two ADA questions, and only when the dog's role is not obvious. A stranger in the park asking "is that a real service dog?" is just being nosy.
Teaching kids about service dogs
Children love dogs, and a calm dog in a vest is a magnet. They are not being naughty when they reach; they just have not been taught yet. A few habits make it easy:
- Practice before you need it. At home, make a game of it: "When a dog is wearing a vest, we look with our eyes and keep our hands in our pockets." Kids remember a rule they have rehearsed.
- Give them the words. "That dog is working. It's helping its person, like a job. We don't bother people at work."
- Show them what they can do. They can wave at the person, say hi to the person, or tell you afterward what they noticed about the dog.
- Teach them to ask, not reach. If they want to pet any dog, service dog or not, the question goes to the grown-up holding the leash: "Can I pet your dog?" And "no" is a normal answer.
- If they have already reached, keep it low-key. Gently bring their hand back, say "Oops, that dog is working," apologize to the handler, and move on. No scolding needed.
Teachers can use the same words for a whole class. If a classmate is going to bring a service dog to school, a short, calm explanation on the first day saves a lot of reaching; see service dogs at school.
Scripts for handlers: what to say when someone reaches
If you are the person on the other end of the leash, you already know how often this happens. Having a few lines ready makes it less tiring. Use whatever fits your day:
- Before they touch: "Please don't pet her, she's working."
- When you want to be warm about it: "Thanks for asking first. He's on duty right now, so it's a no, but I'll tell him you think he's handsome."
- To a child: "You asked so nicely. She's doing her job right now, so she can't say hi, but you can wave to her."
- To a parent: "Would you mind helping them keep their hands back? She needs to focus on me."
- When someone keeps going: "I need you to stop now. He's a medical service dog and he has to pay attention to me."
- When their dog is pulling toward yours: "Could you please keep your dog back? Mine is working."
- When they ask about your disability: "I'd rather not get into that, but thanks for asking before you petted him."
You never have to explain your health to a stranger. Some handlers prefer to let the gear speak first: a clearly lettered vest, a do not pet leash or a patch cuts down on the reaching before it starts, though no gear is required and none gives your dog any legal status.
Is it illegal to pet a service dog?
A single pat is not a crime in itself. But interfering with a service dog can be. California makes it a misdemeanor to intentionally interfere with a guide, signal or service dog "by harassing or obstructing" the dog or its user (Penal Code 365.6), and it is a separate offense to let your own dog injure one (Penal Code 600.2). Montana made it a misdemeanor in 2025 to keep up behavior that interferes with a service animal "after the person has received notice on the behavior", or to negligently let your own dog do so (MCA 45-8-227). The common thread: when the handler says stop, stop.
One more thing worth knowing: if you provoke a service dog and it barks, that is on you, not the dog. DOJ says a dog that "barks because someone has provoked it" is not out of control.
Common questions
Can I pet a service dog if the owner says yes?
Yes. It is the handler's decision. Stroke the shoulder rather than the head, keep it short, and stop when asked.
Can you pet a service dog in training?
Only if the trainer or puppy raiser says yes. The dog is learning to ignore strangers.
Can you pet emotional support dogs?
Ask the owner first, as with any dog you do not know. If the dog wears "do not pet" gear, the answer is already no.
What does a "do not pet" vest mean?
The owner is asking you not to touch the dog. It does not say whether the dog is a service dog, and it is worth respecting either way.
Is it rude to ask if I can pet a service dog?
No. Asking is always better than reaching. Just be ready for a no.
Can I talk to a service dog?
Talk to the person instead. Talking to the dog, calling its name or making noises can distract it.
What should I do if a service dog comes up to me without its person?
Follow it. Atlas Assistance Dogs says the dog may take you to a handler who needs help. See service dog etiquette.
Sources
- 28 CFR 36.104, definition of service animal
- DOJ ADA service animal FAQ (questions 2, 4, 27)
- California Penal Code 365.6
- California Penal Code 600.2
- Montana Code Annotated 45-8-227
- Guide Dog Foundation for the Blind, Assistance Dog Etiquette
- Atlas Assistance Dogs, Service Dog Etiquette
- AKC, Canine Good Citizen
General information, not legal advice. Policies and laws change; follow the sources. Last checked September 25, 2026.