How do I help a dog who is afraid of strangers and other dogs?
Start with distance, not with exposure. Fear is worked on at a range where the dog can still think, and forced greetings make it worse rather than better: let him approach on his own, keep hands low, and let the treats come from you for looking and then looking away. In a survey of about six thousand dogs, the biggest risk factor for fear of strangers and of unfamiliar dogs was inadequate socialization between 7 and 16 weeks; breed (and, for fear of dogs, small body size) also mattered a lot, and urban living and inactivity were linked too.
In short
The whole chapter in a few lines. Read further only where you want to know why.
A breed summary is only a prejudice about the breed.
You can use prejudices — but get to know your own dog.
It depends on the breeding, the environment, and the dog’s own character. He may have all of the breed’s traits, some of them, or none. Every dog is his own.
1 This is the most common problem there is
In a representative sample of Danish dog owners (Meyer et al., 2023; 502 owners), fear was the most commonly reported behavior problem, in 18% of dogs (90 of 502). Most often it was fear of noises (51 dogs), so fear of people or dogs is a smaller part of that.
It is worth starting there, because a frightened dog in public looks like a failure of ownership, and owners take it personally. It is the single most ordinary problem a dog can have.
It also gets misread constantly. A dog who barks and lunges at the end of the leash looks aggressive; very often he is asking for distance in the only way he has left. What sits behind that display is its own chapter.
2 What six thousand dogs showed
A population survey from the University of Helsinki, published in Scientific Reports, looked at 5,973 dogs for fear of other dogs and 5,932 for fear of strangers, and sorted the risk factors.
| Factor | What they found |
|---|---|
| Inadequate socialization between 7 and 16 weeks | The biggest factor, for fear of strangers and of unfamiliar dogs alike |
| Urban living | Urban dogs were more fearful than dogs from the country |
| Inactivity | Social fearfulness went with infrequent participation in training and activities |
| Small body size | Associated with more fearfulness |
| Female sex, neutering | Both associated |
| Breed | Large variation between breeds |
A companion paper found the mirror image: an active and social life went with lower fearfulness of the non-social kind.
On the breed line, one note: we did not find a French Bulldog figure in that breed comparison. What we do have is a single pilot study from Italy, in which owners filled in the C-BARQ, a standard questionnaire about their dog’s behavior. It reports low fear scores for the breed — and an average does not describe your dog.
3 A second source says the same: the first weeks matter most
The largest risk factor in the Finnish data is inadequate socialization between 7 and 16 weeks. The position statement of the AVSAB (American Veterinary Society of Animal Behavior) calls the first three months of life the most important time for puppy socialization.
Two different sources point at the same early weeks. That is why the socialization chapter is the one with a deadline on it.
If you have a puppy, that is where to spend your attention right now. If you have an adult, skip to the last two sections — the answer there is different, and it is not “too late, sorry”.
4 Where you live is a risk factor, and nobody mentions it
Urban dogs came out more fearful than country dogs. More noise, more strangers, more things arriving without warning, and fewer encounters that end in nothing much.
This is the point this site keeps making in other chapters: a dog in a yard in a hot country and a dog in a city apartment are not running the same risks, and almost all advice in English is written for one of them. If you live in the middle of a city, you are not doing anything wrong — you are simply starting from a harder position, and it is better to know that than to wonder why it is harder.
What follows from it is practical: choose the hours and the routes. The same street at 7 in the morning and at 6 in the evening are two different training environments.
5 Small dogs are handled in ways big dogs never are
Small body size is associated with more fearfulness. Our opinion: part of that is likely the dog, and part of it is what happens to small dogs:
- They get picked up without warning — the complete removal of the option to leave.
- They get approached from above by strangers, because they are cute, and cute overrides manners.
- They are rarely given the space that a large nervous dog is granted automatically.
- Their warnings are treated as funny rather than as information.
A 12 kg (26 lb) dog gets handled in ways nobody would try on a 40 kg (88 lb) dog. That is worth saying plainly, because it is the part an owner can change today, by changing what they allow.
And for this breed it compounds twice. A French Bulldog is small, popular, and constantly approached: the flat face invites strangers to reach in. Then, when he tries to say no, the signal does not carry well. A frightened Frenchie is a dog whose refusal is hard to see — which is what touch and consent is about.
6 What helps
Distance first. Fear is worked on below threshold: at a range where he notices the person or dog and can still eat, look away, and move. If he cannot take food, you are too close. Back up until he can.
Never force a greeting. “Let him say hello, he needs to learn” is the most damaging sentence in dog ownership. Forced exposure is not socialization; it is the thing socialization was supposed to prevent.
Let him approach, never the other way round. Hands stay down, no leaning over him, no staring into his face. If he chooses to come in and then leaves again, that is the exercise working, not failing.
Treats come from you, not from the stranger. A stranger holding out food pulls a frightened dog into a space he was not ready to enter, and the conflict makes the whole thing worse. Pay him, from your hand, for looking at the stranger and then disengaging.
Do things together. The data is direct about this one: dogs who take part in training and activities are less socially fearful. For a flat-faced dog that cannot mean distance running — it means short sessions, scent games, new places at low intensity. How he learns is its own chapter.
Say it out loud. “No, thank you, he does not say hello” is a complete sentence. You do not owe anyone an explanation, and your dog cannot make that sentence himself.
7 If the window has already closed
Two halves again.
What we do not have: good evidence on how much fear improves after the socialization window closes. We looked. The research on how fear arrives is much stronger than the research on how far it can be walked back.
Our opinion: it is reasonable to expect that you will be managing rather than curing, and that management is not a failure. A dog who is comfortable because his person keeps the distance, picks the hours, and turns down the greetings is a dog having a good life. The measure is not whether he can be petted by strangers. The measure is whether he is frightened.
And if the fear is severe, growing, or has ever ended in contact with a person, that is the point to bring in your vet and then a certified behavior professional. Pain changes everything about how a dog reacts, and it is the first thing to rule out rather than the last.
8 Spike: our experience
Our stories and opinions on this page are our personal experience with one dog, Spike. One dog is not the measure for every dog — for your dog, your vet decides.
“Three risk factors on the list, and people and dogs do not frighten him.”
Spike should, on paper, be a nervous dog. Go down the list:
- Urban. He lives in Santiago, in a house right by the road. From the yard, through a gate, he sees the street, 8 m (26 ft) away, and a second gate opens straight onto it.
- Inactivity. As a puppy and for a long stretch afterwards he was walked two or three times a week. He was very much a house dog.
- Small. 12 kg (26 lb).
And he is not frightened of people. Strangers can pet him, children included, and the reaction is not tolerance so much as indifference: you stroke him and he looks at whatever he was already interested in. The only thing that gets his attention is someone finding the exact spot that itches.
This does not contradict the study. That work reports odds across about six thousand dogs, not the fate of one, and a dog can draw a good card. We also cannot tell you why he drew it: it was not activity, and it was not the environment. It may be the breed, where the one pilot study we have reports low fear scores. It may be him. We are not going to guess.
What his case is good for is the rule underneath the whole chapter, and it works in both directions: use the odds, but meet the dog in front of you. An owner who has ticked three boxes on that list has not been handed a verdict — and an owner whose dog ticks none of them can still have a frightened dog and should be believed.
Owners Also Ask
How do I help a dog who is afraid of strangers and other dogs?
Start with distance, not with exposure. Fear is worked on at a range where the dog can still think, and forced greetings make it worse rather than better: let him approach on his own, keep hands low, and let the treats come from you for looking and then looking away. In a survey of about six thousand dogs, the biggest risk factor for fear of strangers and of unfamiliar dogs was inadequate socialization between 7 and 16 weeks; breed (and, for fear of dogs, small body size) also mattered a lot, and urban living and inactivity were linked too.
Is it normal for a dog to be afraid of people?
Fear in general is the most commonly reported behavior problem. In a representative Danish sample (Meyer et al., 2023; 502 owners), some kind of fear was reported in 18% of dogs (90 of 502), most often fear of noises (51 dogs), so fear of people or dogs is a smaller part of that. It is also frequently mistaken for rudeness or aggression, because a frightened dog at the end of a leash barks and lunges rather than asking politely for room.
Should I let strangers give my nervous dog treats?
The better version is that the treats come from you. A stranger holding out food pulls a frightened dog closer than he was ready to go, and the conflict between wanting the food and not wanting the person makes it worse. Pay him yourself for looking at the person and then looking away.
Does where I live really affect my dog’s fear?
In the Finnish survey, urban dogs were more fearful than dogs living in the country. More noise, more strangers, and fewer encounters that end in nothing. It does not mean city dogs are doomed; it means you choose your hours and your routes deliberately instead of hoping the street will be quiet.
My dog missed the socialization window. Can his fear still get better?
We did not find good evidence on how much improves after the window closes, and we would rather say that than promise. Our opinion: it is reasonable to expect to manage rather than cure — keep the distance, choose the situations, and turn down greetings. If the fear is severe or growing, start with your vet, because pain changes how any dog reacts, then a certified behavior professional.
References
- Puurunen J et al. Inadequate socialisation, inactivity, and urban living environment are associated with social fearfulness in pet dogs. Scientific Reports, 2020. nature.com
- University of Helsinki — Urban dogs are more fearful than their cousins from the country. helsinki.fi
- Active and social life is associated with lower non-social fearfulness in pet dogs. Scientific Reports, 2020. nature.com
- Meyer I, Forkman B, Lund TB, Sandøe P (2023). Behavior problems in dogs — an assessment of prevalence and risk factors based on responses from a representative sample of Danish owners. Journal of Veterinary Behavior 69–70:24–31. sciencedirect.com
- AVSAB — Position Statement on Puppy Socialization (PDF). avsab.org
- Gazzano V et al. (2026). Behavioral Characteristics of French Bulldogs in Italy: A Pilot Study Using the C-BARQ Questionnaire. Pets 3(2):21. doi.org
