27.03.2025

Understanding Dog Reactivity:

It’s Not Always About Aggression

When we talk about reactive dogs, it’s easy to picture barking, lunging, or growling — behaviours that are often misunderstood as aggression. But the truth is, not all reactivity stems from aggression. In many cases, it’s actually a sign of frustration, excitement, or even confusion about how to interact with the world around them.

Reactivity vs. Aggression

Reactivity is an emotional response, often triggered by things like other dogs, people, bikes, or unfamiliar sounds. A reactive dog might bark, lunge, or whine on the lead not because they want to attack — but because they desperately want to interact and don’t know how. Others may react because they’re nervous, unsure, or simply overstimulated.

Aggression, on the other hand, is a much more intentional and serious behaviour, often rooted in fear or a desire to create distance. Understanding the difference is key to supporting your dog properly.

Frustration: The Silent Driver

A common cause of reactivity is frustration — especially in social, high-energy dogs. Picture this: your dog sees another dog across the street. They’re friendly, excited, and keen to say hello… but they’re on a lead. They pull, whine, bark, and maybe even lunge. To the untrained eye, this might look like aggression, but it’s really just a dog struggling with being restricted and unable to greet in the way they want to.

Over time, that frustration can build into tension, and dogs may start to associate seeing other dogs with stress. This is where socialisation, and how we manage greetings, becomes incredibly important.

The Importance of Proper Socialisation

Proper socialisation doesn’t just mean exposing dogs to lots of other dogs or people — it means teaching them how to behave calmly and appropriately in those situations. Socialisation helps dogs learn vital skills: how to read other dogs’ body language, how to disengage, and how to stay calm in stimulating environments.

It also helps prevent reactivity in the first place — especially if done gradually, positively, and with awareness of your dog’s comfort levels.

On-Lead vs Off-Lead Greetings

Lead reactivity is one of the most common forms of reactivity — and for good reason. Being on a lead removes choice from the dog. They can’t move away if they’re unsure, and they can’t greet freely if they’re excited. This restriction often leads to tension, which in turn leads to reactive behaviours.

Many dogs are far more relaxed when greeting off-lead — they can approach naturally, give calming signals, curve around the other dog (rather than going head-on), and walk away if they feel uncomfortable. On a lead, these natural behaviours are often suppressed.

However, not all dogs can or should be off-lead, especially in public spaces. That’s why teaching your dog calm lead manners, and choosing safe and appropriate opportunities for off-lead socialising, is so important.

Be Mindful During Dog Greetings

One common mistake that can accidentally cause a scuffle is grabbing a dog by the collar during a greeting. Even a friendly, well-socialised dog might feel trapped or panicked if suddenly restrained mid-greeting — especially if they’re unsure of the other dog. That sudden tension can trigger defensive behaviour or even a fight.

Instead, let greetings be calm, short, and positive. Watch both dogs’ body language closely, and if needed, calmly call your dog away using a treat or cue they know well.

What To Do If an Off-Lead Dog Approaches

It’s one of the most stressful situations for any dog owner — especially if your dog is reactive, nervous, or in training. You’re out on a walk, your dog is on-lead, and suddenly, an off-lead dog starts heading your way.

Here’s what to do:

🧘‍♀️ Stay calm. Your dog will feed off your energy. If you panic, tighten the lead, or start shouting, your dog may feel more anxious or defensive.

🚶‍♀️ Create distance. If you see a dog approaching and think yours might react, calmly turn and walk in the opposite direction. Increasing space is often the most effective way to prevent escalation and keep both dogs under threshold.

🛑 Stand still if you can’t move away. Sometimes turning isn’t possible — if that’s the case, keep your body relaxed and neutral. Avoid tightening the lead, and focus on calmly guiding your dog’s attention back to you.

🚫 Advocate for your dog. It’s okay to say no. If the other dog’s owner is nearby, call out calmly: “Please call your dog — mine needs space.” You don’t need to justify it.

🛡️ Block if necessary. If the off-lead dog continues toward you, position yourself between the dogs. You can use your body, a walking stick, or toss treats away to redirect the other dog. It’s not aggressive — it’s protective.

🎯 Stay in control. Keep your dog on a loose, short lead and speak to them calmly. Having a few high-value treats ready can help redirect their focus and keep things positive.

Remember: You are allowed to protect your dog’s space. A reactive moment doesn’t define them — but repeated negative encounters can make things worse. Creating distance and setting boundaries helps prevent setbacks and build trust.

Final Thoughts

Reactivity isn’t a reflection of a “bad” dog — it’s communication. Whether it’s fear, frustration, or overexcitement, your dog is trying to tell you something. With patience, understanding, and the right training, reactive behaviours can improve dramatically.

And if you find yourself feeling overwhelmed, remember: you don’t have to handle it all alone. Reactive dogs require support, not shame — and with the right guidance, they can thrive.

💛 Need help navigating reactivity or building your dog’s confidence? Get in touch — I’d love to support you.