I have an 11month girl American bulldog and she is a really great dog and friendly but tooo freindly to stranger and people. She is great with my family though but when strangers come around she is the same with them. How can I get her to be more Tuff and Aggresive towards strangers and other animals. The other day I took her to the dog park and she was being punked by a dog half the size she is and she got a bite from that dog. I was trying to get her more aggressive towards other dogs and make her less of a punk. I dont like her getttin bully'd around by other dogs. can Anyone help us!?!?!