there are many many reasons to avoid a dog park even with the most socialized well trained and behaved dog. Disease and BSL are at the very top. It doesn't matter if your dog was even in a fight, it could be other dogs that get at it, but YOUR dog would be the one mentioned. Its has happened many many many times, including from someone on here! Why take the risk when there are many other places and people and dogs you could socialize with that don't include allow your dog off leash on public property with dogs and owners you do not know?Good management and knowledge prevent trouble. I agree with this 100%. If you know your dog and have trained him well and spent some good quality time with him or her, then there is not a reason why you can not allow him or her to socialize at the dog park.