Dog to dog aggression while camping

joeshmoe wrote:
Essentially, you told the owner to leash his dog because you haven't fully socialized yours.

Our first Border Collie was very well socialized with other dogs, enjoyed meeting other dogs. That is until the day a loose dog at a park came running over to us with our leashed dog. The owner yelled "he's friendly"; that dog immediately jumped our dog (no warning, straight on top of our dog). Our dog had to crawl under a park bench to prevent the loose dog from continuing to attack; we were unable to stop the strange dog and his leash (even once dropped by us) put him at a disadvantage. After that event our dog distrusted every strange dog that ran towards him. After that event he was always on the defensive when meeting loose strange dogs and his defensive posture made meetings tense with every new dog.

I guess you would say we failed in the socialization of our dog because he distrusted strange dogs after he got attacked by a strange dog.