I have a 8 month old Blue Heeler, Sissy. I have been able to train her the basics, Sit, Lay down, etc. But I haven't been able to teach/train her not to use my forearms as a chew toys. She has done this since she was about 4 months old. I know the breed Blue Heeler tend to nip and bite, but this is too much. Sissy only does this to me, but not the rest of the family. Can anyone give some tips on how to stop this? Or tell me where I went wrong?

Tell her NO BITE and maybe pretend she hurt u. I have the same problem but he bites everyone. His name is hunter and he is 5 months. He usually wakes me up around 6 any tips?