As frequenters of many dog parks in the Manhattan area, we have seen all sorts of strange things and behaviors in dog parks. After witnessing some poorly thought out things brought in the dog park this weekend, we felt it fitting to write a list of the top 10 things you should never bring into a dog park. If you have the run to yourself it would be one thing, but as the weather gets nice more and more people flock to the dog runs and overcrowding can become an issue. In a crowded run bad behavior is more likely to cause a problem. So for the sake of you, your d