Why does my dog bark at other dogs on the lead?

You're out for a perfectly nice walk. Your dog is doing well, the lead is loose, everything is calm… and then another dog appears.

Suddenly, your lovely walk turns into barking, pulling, lunging or spinning around on the lead.

Sound familiar?

This is one of the most common questions we get asked:

“Why does my dog bark at other dogs when they're on the lead?”

Often followed by:

“But they're fine with other dogs normally!”

The first thing to understand is that barking at another dog doesn't automatically mean your dog is aggressive.

There are several reasons dogs behave differently when they're on a lead – including something called barrier frustration.

So, before worrying that your dog suddenly dislikes every dog in the neighbourhood, let's look at what might actually be going on.

There isn't one simple answer.

Some dogs bark because they're worried. Some are frustrated. Some are over-excited. Others have simply learnt that barking works.

And sometimes what you're seeing is barrier frustration.

It sounds technical, but it's actually quite simple.

A barrier is anything that prevents your dog from getting where they want to go – and in this case, the lead is the barrier.

Think about what happens when dogs are free to move.

They can approach another dog, move away, change direction, create distance or decide not to interact at all.

Put a dog on a lead and suddenly many of those choices disappear.

Your dog spots another dog and wants to go over to investigate, play or simply get closer, but they can't. The lead stops them.

That frustration can quickly build.

First comes the staring.

Then perhaps some pulling.

Then whining.

And suddenly…

BARK! BARK! BARK!

You can see similar behaviour with some dogs behind a gate, fence or even a window. Take away the barrier and you may see a completely different dog.

This is why owners often tell us:

“I don't understand it. My dog is fine with other dogs when they're off the lead!”

And they may be absolutely right.

The barking isn't necessarily about wanting to fight the other dog. It may simply be frustration because they can't make the choice themselves.

Is my dog aggressive, or are they trying to tell me something?

A loud dog isn't necessarily an aggressive dog.

We've worked with plenty of dogs over the years who make an enormous amount of noise when they see another dog on the lead, but underneath all that noise is a dog that is worried, unsure, over-excited or frustrated.

That's why we need to look beyond the bark.

Ask yourself what happens before your dog reacts.

Do they suddenly stop?

Does their mouth close?

Do they stare?

Do their ears or body position change?

Do they start leaning into the lead?

Are they trying to move towards the other dog – or are they actually trying to create distance?

And, importantly:

Can they still respond to you?

These little details tell us far more than the barking itself.

It's also worth remembering that not every dog wants another dog walking straight towards them.

We humans tend to think that dogs should automatically want to meet and be friends with other dogs.

They don't.

Just as we don't feel the need to stop and introduce ourselves to every person we pass in the supermarket, our dogs don't need to meet every dog they see on a walk.

Sometimes the best interaction is no interaction at all.

Why does my dog's barking seem to be getting worse?

This is where learning comes into it.

Dogs repeat behaviours that work.

Imagine you're walking along and another dog appears.

Your dog starts barking and lunging.

The other dog keeps walking and eventually disappears.

What might your dog have learnt?

Dog appeared → I barked → dog went away.

Job done!

Next time a dog appears, barking may happen a little quicker.

There's another version too.

Your dog sees another dog and desperately wants to say hello.

They pull.

They bark.

They jump around.

Eventually you give in and say:

"Okay, go and say hello then."

Your dog has just learnt:

Dog appeared → I barked and pulled → I got to meet them.

Again, the behaviour worked.

This is one reason we don't recommend allowing dogs to routinely greet every dog they see while they're on the lead.

We want dogs to learn that seeing another dog doesn't automatically mean something has to happen.

Another dog can simply walk past.

Nothing exciting happens.

Nothing frightening happens.

You acknowledge them, carry on walking and get on with your day.

Calm neutrality around other dogs is a hugely useful life skill.

What should I do when another dog appears?

One of the biggest mistakes we see is waiting until the dog is already barking and lunging before trying to do something.

At that point, you're often too late.

Your dog may already be so focused on the other dog that listening to you has become incredibly difficult.

Instead, become really good at spotting the moment before the reaction.

You see the other dog.

Your dog sees the other dog.

Their body changes slightly.

That's your opportunity.

Get their attention.

Keep moving.

Change direction if necessary.

And give them enough distance to cope.

This last point is particularly important.

If your dog can calmly pass another dog from ten metres away but struggles at two metres, don't insist on getting within two metres.

Work with the dog you have in front of you.

You don't need to prove anything by squeezing past another dog on a narrow pavement while desperately holding your dog back.

Cross the road.

Move to one side.

Turn around.

Create space.

Distance isn't failure.

Sometimes distance is exactly what allows your dog to stop reacting and start learning.

Neil's Top 5 Tips for dogs that bark at other dogs

If your dog regularly turns your peaceful walk into something rather less peaceful when another dog appears, here are Neil's five things to start working on.

1. Spot it before your dog does

Don't wait for the explosion!

Start looking ahead on your walks and learn your dog's early warning signs.

The moment your dog notices another dog and starts to fixate is the time to get their attention, not after they've been barking for 30 seconds.

2. Give your dog more space

Distance is one of your best tools.

If your dog reacts at three metres but can stay calm at ten metres, start at ten.

As your dog becomes better at staying focused on you, that distance can gradually change.

Forcing them closer when they're already struggling rarely teaches them anything useful.

3. Don't get into a battle with the lead

Dog pulls.

Owner pulls back.

Dog pulls harder.

Owner tightens the lead even more.

Now everybody is tense.

Try to keep your handling calm and purposeful rather than turning the lead into a tug-of-war.

The lead should help you communicate and guide your dog, not become another source of frustration.

4. Stop trying to meet every dog

Your dog does not need to say hello to every dog they see.

In fact, if your dog expects to meet every dog, preventing them from doing so can contribute to barrier frustration.

Teach them something much more useful:

We can see another dog and simply carry on walking.

That's not being antisocial. It's teaching your dog to be comfortable and neutral around other dogs.

5. Reward the moments you want more of

This is one owners often miss.

Your dog sees another dog and looks back at you?

Good.

They disengage from staring?

Good.

They walk past another dog without barking?

Good.

They recover quickly after becoming excited?

Good.

Those small moments matter.

Don't wait for the "perfect" walk before acknowledging progress.

The little successes are what eventually create the bigger ones.

Still not able to decode why your dog is barking and lunging at other dogs, get in touch with us, let us help you unravel what your dog is thinking and guide you on how to respond appropriately - give Neil a call on 050 8717 073/2 (WhatsApp after hours).