In ignorance, I took Willow to an offleash park soon after I got her, which was a huge mistake. For the first and only time she showed aggression towards one dog, that nipped her on the back. Before that happened she was having the time of her life with another dog. I then did some research and now avoid off-leash parks. Luckly the house I rent how has a huge backyard she can run full-pelt around and we can play fetch and train as well.