Being protective. Dogs are very terrirtory(sorry if I spelled it wrong)Sometimes dogs are scared or nervous they bark, or bite.Try introducing her to them. Find her weakness. For example, my dog, Mylee(beagle)loves food/treats/bones and if you give her food..she will love you forever. Find your dog's weakness...bones, treats, toys, favorite______(whatever), stuff like that.
Hoped I helped!
Hoped I helped!