I use to take Sheila to the dog park to run around off leash, but did it when there is either no other dogs around, or atleast no other bully breeds around. I have several dog parks (4 to be exact) within 10 minutes of my house so I'd just go to the first, too many dogs, go to the next etc.... Until I felt comfy. HOWEVER, after coming across this forum, and seeing dog fights first hand at the dog parks, I have not taken her back. I do take her to the local park where dogs are allowed, but have to on leash. There we walk the 3 mile track and then there is a back corner to the park, big open grass field where I train with and play frisbee with Sheila. I let her run around with her leash attached and keep an eye for oncoming joggers or dog walkers so I can get to her and put her in a down or just grab the leash. But dog parks I think are no more. Especially since taking her to the Shutz club, the director told me Sheila should not play with dogs that much, why, cuz I should be the center of her world, her favorite toy, her favorite thing to play with. Said it helps with the training etc...... Made sense what she said " there is no way a human can compare to another dog, another dog smells better, plays better, and that in the long run if done to often can hamper your training for shutz." Don't know if she was being crazy control freak, but it kinda make sense. The other things she mentioned are obvious, Dog parks increase the chances of your dog fighting (duh) and getting injured, and also increase the chances of getting sick from someone elses sick dog.