It varies park to park and dog to dog. Some of them are great, it all depends really on the people who participate. Any fenced in area where a dog can burn off energy is a good thing, and dog parks can help socialize a pup and get it used to meeting dogs of all sizes and kinds.

But if the humans using the park don't pay attention and don't control their dogs, it's a bad thing for everyone concerned.

There's no easy answer!