Last week was my dog's first trip ever to a dog park. I was worried because we just adopted him a few months ago, and I believe he had been abused previously, because he's skittish. I was afraid he might be afraid of the other dogs.
I was wrong. After 15 minutes in the timid dog area he was bored! We went to the section with the lake and the bigger dogs, and he loved it. He was only brave enough to slosh around a bit at the edge of the lake, but there were a few smaller dogs his size in there for him to run around with. He's a long hair chihuahua mix (bigger than the taco bell dog, and harrier).
There was a lot of poop around, but it's a dog park! What did you expect? The dogs and owners were very well behaved. I didn't see any dog or people fights. The only thing that bothered me was that there were people there who paid more attention to their dogs than their toddlers who were roaming around in there freely. Please don't bring your kid if they're still young enough to use a diaper.
Loved Cosmo. Wish it weren't 30 minutes away from my home. I looked at other dog parks in Mesa, and they all seemed pretty boring in comparison to Cosmo. We'll be heading out there tonight for some more doggie fun. :0)