We've never been to one, but I have driven by the big one here in Dallas by one of the bigger lakes....They have a separate one for small and large dogs, but every time I've gone by, it is so crowded, it scares me a little, because, I, too have heard vets talk about how they have to put pups back together again because some irresponsible pet owner had a dog who didn't need to be out there at the park. (whew, how's that for a run on sentence!!) I really liked the idea of the members only dog park. One could really be selective, that way.