Background: Rescue dog. Scared of everything, doing better with training. Lucy (dog) gets along with my sisters dog, after three times of hanging out. She doesn't really get along or not get along with dogs, it depends on the dog. The question: Recently went camping with friends. We had our tent right next to camp where everyone was by it. There were two new dogs. She was really aggressive towards both of them, but one of them she was even more aggressive with. Was this because she felt she had territory to protect? How do I prevent this in the future? How do I introduce the dogs? Why was she more aggressive toward one dog than the other? They were all females.