Quick Answer: Work below threshold — identify the distance at which your dog notices bikes without lunging, and train there with heavy rewards for calm observation. Build a 'leave it' command for moving objects. A front-clip harness prevents the explosive forward lunge. Increase proximity to bikes gradually over many sessions as tolerance builds.
Why Bike Chasing Is Hard To Stop
Moving objects trigger the prey drive — the same instinct that makes dogs chase squirrels. The bike's rapid movement activates the chase sequence instinctively. Bikes also make sounds that increase arousal. Interrupting the chase at the 'notice' stage (before lunging) is far easier than stopping a chase in progress.
The Training Approach
- Find your dog's threshold distance from bikes
- At that distance: bike passes, treats appear immediately and continuously
- When bike is gone: treats stop
- Over many sessions, the bike begins to predict treats rather than triggering chasing
- Gradually decrease distance as the emotional response improves
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