I just got my boxer pup about um... 4 days ago. shes 8 weeks and is showing aggresiveness. When i picked her out she was people sy but great with her litermates. Now she wants attack my gf same age pit bull. I believe in socializing early but it becoming difficult when she growls at other dogs and attack dogs her own size. I signed her up for classe but not till december what can i do to socialize her?