Try our canine mall. . . . She used to be so good about coming when she was called and doing what she was told. It seems like just overnight she's turned into a brat and deliberately disobeys me. She's nine months old. You have the canine equivalent of a rebellious teenager.
Young puppies are very dependent on people and other dogs for instructions.
They have a strong instinct to follow and to fit in. At about six months of age, they start to think for themselves and test their independence. This is also the time when they start to question your authority. This can be a trying time for your relationship. In fact, most dogs taken to animal shelters because of behavior problems are between nine and 18 months old prime canine adolescence.