Why is my 15 months old GSD still biting on things?

by Aaron

I have a german shepherd which is about 15 months old. She has a bad habit of biting at night.

Most of the time,i let her out without confining her in her cage. I thought at her age,she should have stop biting by now.

Why is she still keep on biting things? What can i do to stop her from biting? Thanks!



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