Reactivity Red Flags Every Puppy Owner Should Know
When Does Reactivity Start? Not tied to a single age: Reactivity isn’t like teething — it doesn’t just pop up at 6 months on the dot. It can start in puppyhood, adolescence, or even adulthood. Common window: Many dogs first show reactivity during adolescence (6–18 months). This is when their confidence, hormones, and independence spike — kind of like teenagers testing boundaries. Learned vs. genetic: Reactivity can be influenced by genetics (some breeds and lines are predisposed), early experiences, or what the dog learns about the world
