<human>: One year old female GSD named Leah.  She was "raised" by truckers who kept her in their truck 24/7 then she was dumped at a gas station.  She's scared of men, especially loud men and quick movements.  She's attacked my fiancé before because she was scared and cornered (fiancé walked up behind her to see what she was doing and she freaked).  She's an angel when I'm around and she's my shadow, but every time I leave, she turns into a "bad dog".  My fiancé doesn't help the situation when he yells at her when I'm gone.  So now every time my fiancé even walks past her, she yelps, urinates, and runs away.  My fiancé is fed up with it and wants her gone but I don't.  I work from home and my fiancé is gone a lot so she's my guard dog.  I contacted a dog trainer and they said they'd train her for $2,000.  I'm sorry but that's ridiculous in my eyes. Is there an at home way of fixing her fear/submission issues?  Also, anyone want to come help train my fiancé? ;)

Could you distill the essence of the text into 1-3 sentences?
<bot>: dog is scared of men, want to help her out and fix the problem, want an at home solution. Thank you