
Not getting on with other dogs is a breed trait, I would be surprised if she id, as most Akita's do not get on well with other animals, especially other canines of the same sex as they are very dog dominant and not for the novice.
Reputable breeders for this reason and the strong hunting instinct and Independence say to NEVER let them off lead.
Has the person who owns her approached her breeder to have her back or help re-home to an expereinced owner?