How can you associate two dogs when one is frightened of other dogs and always wants to fight?
try swapping dogs for a few days with your friend she will get to no your friend in his house and the smell of the other dog with out the dog being there she will be more relaxed then bring her home with the other dog still there to show her everything is OK when taking them out and play at things she likes to do a lot of praise ignore the bitchiness her part she and praise the other dog she will get to no good girls get hugs bad girls get nothing it worked with my mums dogs good luck