Ecco and I made our way to the dog park. Ecco does not get much time to play with dogs so I thought a trip to petsmart then to the park would be good for her. Upon our arrival at the park there was three dogs there. One older golden and two "puppies" a boxer and was unsure of the breed of the other one. She was fine with the puppies but she did not like the Golden who was very friendly. Then a guy showed up with two adult dogs a Husky and malmoise (sp) both "very well trained"(he let them out of his truck with no leash and they stayed with him) and friendly (non dominant). Ecco would have nothing to do with and was scared to death. i didn't let her off her leash until I spoke with owner of the bigger dogs he advised me they come all the time and never had an issue. he was right very good dogs. Regardless i guess my question is why was she so scared. I mean started to show a slight amount of aggression due to being scared. Hair on her back straight up, but low and barking, even snapped at the large husky for no reason. Is this because she is a scared puppy that has not been socialized with large dogs or could this be a future problem. She has no problems with dogs her size or smaller just larger dogs scare her. I knew there was a problem when she would not chase her ball which she typically has so much focus on, but not with larger dogs around. When they left she resumed normal behavior and drive. She has never showed any sign of aggression towards people or children.