Why Dogs Bark at Other Dogs on Walks (and What You Can Do About It)

One of the most common concerns owners contact me about is this:

“My dog is lovely at home, but as soon as we see another dog on a walk they start barking.”

It can feel embarrassing and stressful, especially if your dog seems friendly the rest of the time.

But barking at other dogs on walks is actually very common, and it doesn’t necessarily mean your dog is aggressive.

Understanding why dogs bark is the first step to helping them feel calmer.

Why Dogs Bark at Other Dogs

Dogs bark for different reasons, but on walks the most common causes are:

1. Over-arousal

Some dogs simply become very excited when they see other dogs.

Their heart rate rises, their body becomes tense and the excitement spills over into barking.

You often see this with dogs who love playing with other dogs but struggle to stay calm when they spot one in the distance.

2. Frustration

This is especially common with dogs who have learned that seeing another dog usually means playtime.

When they’re on the lead and can’t reach the other dog, the frustration builds and barking begins.

3. Uncertainty

Some dogs bark because they feel unsure.

Barking can be a way of creating distance or expressing discomfort.

You might notice this if your dog’s body becomes stiff, they stare at the other dog or their tail position changes.

Why Pulling and Barking Often Happen Together

Many dogs that bark at other dogs are also pulling strongly on the lead.

This happens because the dog becomes focused on the other dog and forgets about the handler.

When this pattern repeats often enough, the dog learns:

See dog → pull and bark

Breaking that pattern is the key.

What Helps Dogs Stay Calmer

In training sessions I often focus on helping dogs learn a different pattern when they see another dog.

Instead of fixating on the dog, we reward the moment they look back towards their handler.

This is sometimes called disengagement.

The pattern we want to build looks more like this:

See dog → check in with handler → earn reward

Over time this helps the dog realise that staying connected with their owner is the best option.

Small Changes Make a Big Difference

A few simple adjustments can make walks much easier:

reward your dog for checking in with you
give your dog enough distance from other dogs
avoid forcing close greetings on the lead
keep walks calm rather than overly stimulating

The goal isn’t to force your dog to ignore other dogs completely.

Instead we want them to notice the other dog and then calmly re-engage with you.

Getting Help With Barking on Walks

If your dog barks at other dogs on walks, you’re not alone.

It’s one of the most common issues I help owners with at Penarth Dog Training.

Using reward-based methods, we focus on helping dogs feel calmer around other dogs and building strong engagement with their handler.

With the right training, many dogs can learn to walk past other dogs much more calmly and confidently.

If you’d like help improving your dog’s behaviour on walks, you can find out more about training with Penarth Dog Training in Penarth and the Cardiff area on the website.