She needs consistent discipline. I do not allow the dogs to growl at me or bite me hard. Kaleb has around trainers since he was 4 months old though. If they saw a problem they talked me through it right away.
When you get home and she is very excited do you match her excitement? I have three dogs and the two little ones get very excited when I get home and I would show I was happy to see them. When we got Kaleb he saw their excitement as playtime and he would often get to rough with them. I've started coming home very mellow. If they act excited I stay calm and speak in a calm voice...usually saying down, because they jump a lot. When I stay calm they stay calmer than they were and the GSD doesn't amp out.
I don't give up on dogs. I would get a trainer involved. They will be able to help with her and you.
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Riley - 11/05/2012-8/30/2013 (Myasthenia Gravis)
He will always be in my heart.