So tonight my dog has been acting up. She's usually kind and friendly. I've been with my in laws for the summer and they have two puppies probably around the ages of (6m) my dog is 9m. They usually play and get along. However tonight my inlaws dogs have been nipping at my dog and biting her. Trying to get her rowled up. It's working she is getting agressive and tries to attack them. Everytime they get near her she starts to growl.