Good Dogs! (01-09-2017) #6063: Lise from Avidog International discusses adolescence in dogs. At 18 months the “true dog” emerges and s/he is now becoming the dog s/he is meant to be. Tracie laments the change in her own 18 month old, Wanda and her prey drive towards other dogs. Lise explains that going after something smaller creates a chemical reaction in the brain that is so exciting that the dog can become deaf and dumb to your attempts to your attempts to stop her. The trick is to interrupt it before it is triggered.