There is no one definitive answer to this question, as the best way to punish a Doberman may vary depending on the individual dog's personality and temperament. However, some possible methods of punishment for a Doberman could include verbal scolding, time-outs, or removal of privileges (such as not being allowed to go on walks or play with toys). In more severe cases, physical punishment such as spanking may be necessary. Ultimately, it is important to find what works best for your particular dog in order to effectively discipline them.