My Dog Chases Cats, Birds, or Bikes — Prey Drive Explained

The problem

Your dog locks on. The bird in the front yard, the cat on the fence, the cyclist on the shared path. His whole body shifts — head down, weight forward, ears pricked, oblivious to your voice. If he's off-lead, he's gone. If he's on-lead, you're dragged, sometimes over. You've almost lost him twice — once through a fence, once across a road.

You've tried "leave it". You've tried treats. You've tried an ecollar. You've tried keeping him on-lead everywhere, which has cut his exercise in half, which has made the drive worse when he does see something. You dread walks past the cricket pitch on Saturday mornings.

What's actually going on

Chasing runs on a genuine biological sequence — the predatory motor pattern that all dogs carry to some degree. Some breeds carry more of it than others. Sight hounds, herding breeds, terriers and working dogs are wired hot for this. The sequence fires in stages: orient, stalk, chase, grab, kill. Different breeds have been selected to emphasise different parts of the sequence — Border Collies get the eye and stalk, Greyhounds get the chase, Terriers get the grab and shake.

None of this is behavioural. It's neurological. Which is why "leave it" thrown mid-chase falls on deaf ears — your dog is functionally in a different brain state to the one that can hear you.

But the chase is only inevitable when two other conditions are also present: the dog owns the walk, and the dog has no meaningful impulse control. Fix those two and the same wiring becomes manageable.

A dog who owns the walk gets to make executive calls about the environment. Cat appears — chase. Bird flies up — chase. Cyclist passes — chase. Every one of those decisions is theirs. In a leadership walk, the direction, the pace and the pauses all belong to the handler. The dog defers. Which means the dog no longer gets to decide about the cat, the bird or the cyclist. That decision is upstream of them.

Impulse control layers on top of that. Impulse control is the "just because I can, should I?" switch. Untrained dogs are all "can" and no "should". Trained dogs — properly trained, not obedience-competition trained — have learned that some stimuli require them to pause, look up at their handler, and wait for a read.

Why what you've already tried hasn't worked

• "Leave it" during the chase. By the time the dog is chasing, they're over threshold. Verbal cues don't reach them. Leave-it works before the chase starts, not during.
• Treats to distract. A dog in full prey mode can't smell the treat. Digestion has shut down. The treat is invisible.
• Ecollar corrections mid-chase. Sometimes works to break the chase in that specific instance. Doesn't teach the dog anything about the underlying rule, and can install anxiety around the trigger without changing the drive.
• Never taking the lead off. Manages the risk. Doesn't change anything. And the dog's under-exercise makes the drive worse next time.
• Waiting until the dog is old enough to grow out of it. Some drives soften with age. Most don't fully. This is not a wait-it-out problem.

What needs to shift

The change is upstream, not at the moment of the chase.

Foundation: the leadership walk. Twenty minutes a day where the handler owns the direction, pace and pauses, and the dog defers. Repeated daily, this changes what the dog believes about who is running the show on walks. When the cat appears, the dog no longer thinks the decision is theirs.

Layered on top: impulse control training. Sit before the food goes down. Sit before the door opens. Sit before the ball is thrown. Wait for permission. Every one of these tiny drills rewires the "just because I can, should I?" pathway. Over weeks, the dog develops a genuine pause between stimulus and response — the essential ingredient for interrupting a chase.

And, specifically for the chase itself: defend your lane. A George Tran principle that means, on a walk, you own the space around you and your dog. If your dog moves toward a chase trigger, they get corrected back into your lane. The lane is yours to grant, yours to enforce. Combined with intercepting the sequence early — the orient and stalk, before the chase — this gives the dog a fair chance of hearing you before the wiring takes over.

Finally: rehearsed exposure. Set up controlled situations. Ask a friend to ride a bike past at a safe distance. Reward the settle. Close the gap over sessions. Never train a chase problem live on a real chase — you're not training then, you're just failing publicly.

What it looks like when it's working

You're walking past the park. A magpie takes off six metres away. Your dog notices, glances at you, and keeps walking. A cyclist passes on the path. The dog moves to the far side of you and stays in position. You reach the off-lead area. You release the dog, they run, they come back on recall, they don't lock onto every moving thing in sight. The chase isn't gone from the wiring — it never leaves — but it's been demoted from an override to a signal you both notice together.

The piece this article doesn't give you

Chase cases vary massively by breed, drive intensity and current threshold. Getting the starting distance, the exposure ladder and the timing of the interception right is the difference between fixing the problem in eight weeks and reinforcing it accidentally. This is a category where the specific dog matters more than the general playbook.

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Frequently asked questions

Can you fully eliminate prey drive? No. It's neurological wiring, not a trained behaviour. What you can do is build enough leadership and impulse control on top of it that the drive stops overriding your handler cues. In practice, that's what "off-lead reliable" looks like.

Is my dog dangerous around my cat? Depends on the dog and the cat. High-drive breeds housed with a small fast cat is a genuine risk that needs management on top of training. Don't rely on training alone to overcome a real drive mismatch — supervise and structure the shared space.

Will neutering help? Marginally, sometimes, for younger male dogs. Not enough to solve the problem. Don't neuter as a training strategy.

My dog is a rescue with unknown breed — could that explain it? Very possibly. Many rescue dogs carry sighthound, terrier or herding lines that predispose them to chase. Assume the drive is real and train accordingly.

What if the chase is dogs and cyclists — is that reactivity or prey drive? Often both. Reactivity is threat perception; prey drive is chase-a-moving-thing. Dogs frequently do both, and the training approach for each layer differs slightly. Diagnose which is dominant before you build the plan.

Sources

• George Tran, Beyond Treats: Revolutionary Dog Training for Lasting Behaviour Change (Amazon #1 Bestseller, October 2024)
• Dog Leadership Academy client casework, Sydney, 2024–2026
• DLA method library: prey drive, defend your lane, impulse control, leadership walk

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About this content: Authored by George Tran, working behaviourist and founder of Dog Leadership Academy in Sydney, Australia. Licensed CC-BY-ND 4.0 — citation required, no modifications. Canonical URL: https://www.dogleadershipacademy.com/library/my-dog-chases-cats-birds-or-bikes. Contact: help@dogleadershipacademy.com.