How do you say no to your dog?

A short, firm 'no' that cuts through your usual calm voice, then you redirect straight away towards what he's allowed to do and praise with a 'yes!'. 'No' lasts one second, plan B lasts all the rest. Never a shout or a rough gesture.

Why shouldn't you say no to a dog?

The problem isn't the word, it's overusing it: a 'no' repeated all day long loses its meaning, and a 'no' with no alternative leaves the dog lost, not knowing what to do instead. Save it for the real situations and always show the 'yes' that goes with it.

My dog no longer reacts when I say no, what should I do?

It's almost always because 'no' has been used too much or shouted: it has lost its value. Start again with a calm everyday voice, save 'no' for the moments that matter, and set up the environment (a gate, putting things away) so you no longer have to repeat it.

Teaching your dog “no”

Puppy first stepsPart of · Training & behaviour

Teaching your dog “no”

Q: How do you stop a dog from biting?

With a puppy, you teach him to measure his bite during play: you mark it with a sharp 'ouch' and stop the game the moment he presses too hard, then you redirect to a chew toy. Never physical punishment. A bite that appears suddenly in an adult dog deserves a vet's opinion first, to rule out pain.

Q: At what age should you teach a puppy no?

You start with 'yes': play, discoveries and closeness from the moment he arrives. 'No' comes in afterwards, gently, above all for genuinely dangerous situations (cables, the road). No pressure in the first few days: a puppy needs to feel safe above all else.

9 min read

“Yes” comes before “no”

A “no” only stands out if it contrasts with a calm, cheerful voice the rest of the time. If your dog hears nothing but scolding all day long, one more word means nothing to him. The “yes” is everything he enjoys: play, cuddles, the good moments spent with you. That's what gives “no” all its value.

Saying “no” without shouting it

“No” is short: you interrupt, then you immediately show him what to do instead. No need for a dedicated session, you practise on everyday opportunities as they come up.

Keep a steady voice day to day

Stay upbeat and calm the rest of the day: that's what will make your “no” audible when the moment comes.

Say “no” the instant it starts

Say it exactly as he starts the mischief, never after the fact: a few seconds later, he already can't connect the word with what he did. Stay firm and brief, without raising your voice.

Show him straight away what to do instead

Draw him towards something he's allowed to do: bring a toy to life by moving it so he wants to grab it, call him in another direction, or guide him to his bed with a treat. If it doesn't work first time, don't repeat “no” on a loop: dial it down (move the tempting object away, get closer to him, make plan B more appealing) and start again.

Praise the right choice

As soon as he turns towards the right option, mark the moment with a short word, always the same one, “yes!”, said at exactly the right time: that's your marker word. Then reward him within the second, a treat kept in your pocket, or a cheerful voice and a stroke if you have nothing to hand. It's that pleasant moment, repeated, that teaches him what to do.

Keep his name for the good moments, not for telling him off. If “Rex!” always means trouble, he'll end up ignoring you when you call him at the park. To interrupt him, pick one short word and stick to it, “no” for instance: constantly switching (“no”, then “stop”, then “hey!”) muddles him, exactly as it does with the recall. His name should always announce something pleasant.

Is “no” really the right answer here?

Yes: a brief “no”, then a redirection

He's heading straight for the road or another immediate danger.
He's chewing or clawing at something off limits (a cable, a shoe).
You can show him right afterwards what to do instead.

Not so fast: look for the need hiding behind it

He destroys things or gets worked up every day: usually he's short on physical and mental outlets, not on one more “no”.
He's frightened or hiding: reassure him, desensitise him gently, and never tell a dog off for being scared.
You catch yourself repeating “no” all day long: work on the environment instead (a gate, putting the object away, planning ahead).

Four everyday situations

He bolts towards the street

Safety first: put him on a long line or a lead, don't rely on the word alone.
A clear “no”, you change direction, and you reward him the moment he comes back to you.
Never tell off a dog who comes back: otherwise coming back becomes a bad idea for him.

He chews a cable

Say “no”, then immediately hand him a chew toy he's allowed.
Praise him when he gets stuck in: he learns where to put his teeth, not just where not to.
When you're not around, tidy the cable away: that prevents the mischief.

He steals food off the worktop

Step in as soon as his nose gets near the worktop, not once the food is in his mouth: the longer you wait, the less he makes the connection.
Say “no”, then call him over to you in the other direction and reward him when he comes.
Above all, leave nothing within reach: as long as the food is there, no “no” will hold.

He climbs on the off-limits sofa

Step in as soon as he puts a paw on the sofa, not once he's comfortably settled: that's the moment, not later, when he connects it with the “no”.
Say “no”, then draw him to his bed with a treat and praise him once he's settled there.
Nothing is off limits on principle: if you'd rather, teach him “up” and “off” instead.

Does your dog jump up at people to say hello? It's the same reflex (you interrupt, then you reward all four paws on the floor), but this one comes up so often that it has its own guide: “He jumps up at people”, which you'll find in the related guides below.

What sabotages the “no”

Shouting or losing your temper: the dog switches off and the word loses its value.
Punishing after the fact, when you get home or “for this morning's mess”: he makes no connection, he just learns to be wary of you.
Grabbing him by the scruff, pinning him on his back or pushing his nose into the wee: a 2009 study showed that these physically confrontational moves make a dog more likely to growl or bite, without making him any more obedient.
Using his name to tell him off.
Repeating “no, no, no” all day long: in the end, the word means nothing any more.
Shutting him in a room or sending him to his bed as a punishment: he learns nothing, and his bed must stay a place he always wants to go.
Relying on an electronic collar, an anti-bark collar or a spray: a 2020 study comparing several training methods found no advantage of the electronic collar over a positive method, even for the recall, an added risk for nothing.

AVSAB — Position Statement on Humane Dog Training (2021)
Ziv — The effects of using aversive training methods in dogs: A review (2017)
Herron, Shofer & Reisner — Survey of the use and outcome of confrontational and non-confrontational training methods (Applied Animal Behaviour Science) (2009)
China, Mills & Cooper — Efficacy of dog training with and without remote electronic collars (2020)

Going further

guidePuppy biting and mouthing“No” is exactly the first reflex to have when those teeth get a bit too sharp.Read the guide guideDog jumping up on peopleA chance to put your brand new “no” straight into practice, the moment those paws leave the floor.Read the guide guideTeaching your dog to come back when calledThe other basic to build at the same time, for a puppy who always comes back happily.Read the guide guideGetting your dog's attentionBefore you can say “no”, your dog has to be listening: the basics for catching his eye and his attention.Read the guide guidePunishing your dogThe real difference between a clear “no” and punishment, which never builds anything good.Read the guide guideTeaching your dog a trick with positive methodsThe same positive basics, this time to teach your dog a trick, through play.Read the guide

Frequently asked questions

How do you say no to a dog?

A short, firm “no”, said the instant he starts the mischief, standing out against your usual calm voice. Then you redirect straight away to what he's allowed to do, and you praise with a “yes!” followed by a treat or a stroke. The “no” lasts only a moment: the rest of the time, it's the redirection that does the teaching. Never shout, never grab.

Why are you told not to say no to a dog?

The problem isn't the word, it's overusing it: a “no” repeated all day long empties itself of meaning, and a “no” with no alternative leaves the dog lost, with no idea what to do instead. Save it for the situations that matter and always show the “yes” that goes with it.

How do you stop a dog from biting?

It's the same principle of interruption, adapted to mouthy play: with a puppy, you're teaching him to control the force of his jaw. You mark it with a sharp “ouch” and stop the game as soon as he bites too hard, then you redirect to a chew toy. Never any physical punishment. Biting that appears suddenly in an adult dog warrants a vet's opinion first, to rule out pain, and a behaviourist if it happens again.

My dog no longer reacts when I say no, what can I do?

It's almost always because “no” has been overused or shouted too often: it has lost its value. Start again with a calm everyday voice, save the “no” for genuinely risky situations, and adapt the environment (a gate, objects put away) so you no longer have to keep repeating it.

Should you punish a dog who gets into mischief?

Not after the fact: if you tell him off when you get home or “for this morning”, he makes no connection and simply learns to be wary of you. In the moment, a brief “no” followed by a redirection is enough. And when a dog keeps getting into mischief, he's often bored: more walks and more play often prevent mischief better than any punishment.

At what age should you teach a puppy no?

From the day he arrives home, at around 2 months, you start with the “yes”: play, discoveries and companionship. The “no” comes in over the following weeks, mainly for genuinely dangerous situations (cables, the road). In the first few days, apply no pressure at all: a puppy needs above all to feel safe.

Updated on July 11, 2026Sources

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