What does "under threshold" mean in dog training?

Think of threshold as the point where a dog's arousal outruns its ability to process what it is seeing. Below that point the dog is aware of the trigger and still has choices: it can sniff, look away, eat, sit when asked. Above it the choices narrow to fight-or-flight behavior, and nothing useful is learned because the dog is busy coping. Behavior modification only works in the first zone, which is why every reactivity plan begins by finding it.

Three things set where the line falls. Distance is the obvious one, but intensity matters as much: a dog that copes with a walking dog at 60 feet may lose it at the same distance if that dog is running or barking. Duration counts too, since a few seconds of exposure is easier than a minute of it. The dog's own state on the day shifts all three, which is why a threshold is a range rather than a point.

Once the working distance is known, the job is to keep every repetition under it. That is far easier when the trigger is a helper rather than whatever strolls down the street. VCA's guidance adds other dials besides distance: change the speed of a moving trigger, turn a noise down, or break the trigger into parts such as sound, motion and sight. It advises raising intensity only very slightly after two to three successful sessions, and ending at once and backing off if the dog shows distress.

At Dogtown that control comes from the building. Our 10,000 square feet of indoor floors and turf give Gabriella Pope room to set the distance long on day one and shorten it as the weeks pass; how triggers are staged is decided at the assessment. Owners are part of the work, because the threshold you learn to read in our building is the one you will have to protect on your own street. Our reactive dog training page explains the full program.

Distance is the cheapest tool you have, and the season decides how much of it you get. In the off-season Gloucester's beaches open long sightlines, but they are also off-leash ground: Good Harbor on even-numbered days from October 1 to March 31 and Wingaersheek on odd-numbered days from October 1 to April 30, at the time of writing, with Crab Beach open to off-leash dogs all year. A reactive dog there needs a route along the edge and an exit, because a loose dog can close a hundred feet in seconds.

In summer the beaches close to dogs and the sidewalks fill, so distance becomes a question of timing. Early-morning and late-evening walks on side streets give you more room than midday on a harbor road. Rockport requires dogs to be leashed at all times downtown, which at least makes the other dogs predictable. Tell Gabby where you actually walk at the assessment, so each stage of the program fits the distances your neighborhood can give you.