[header] How to get through puppy adolescence [title] Know what to look for. [step] The age at which your puppy reaches adolescence depends on its breed. Generally, your puppy will enter adolescence when it's between six and 18 months old.
Moreover, you'll probably notice a change in your dog's behavior. Your puppy might become moody, disobedient, unpredictable, or just a " brat " in general.