If you do not live in Arizona and will not be coming through to catch a game, there are a few others around that you may want to check out! They have them in Chicago as well as a few other locations.
Website info:
"Tickets are available for you and your dog in the following location:
Picnic Pavilion: $28 per person & $28 per dog
Bleachers: $18 per person & $18 per dog
Register Now
Check-in will take place outside Gate J, underneath the shaded confines of the 7th Street Bridge. You must arrive by 12 p.m. to participate in the Parade. Water will be provided for your pet during the event, but owners should provide their own dog food.
Please Note:
Dogs must be at least 6 months old.
Owners must include a copy of current vaccinations from a licensed veterinarian.
Dog license required for you to bring your dog to this event.
The Arizona Diamondbacks reserve the right to reject any dog for any reason.
Tickets ordered after Monday, September 8 will be e-mailed to you. Tickets must be printed out and brought to Gate J for check in on Sunday, September 14. This is the only entrance available for you and your dog. All participants are required to register in advance and execute a Release and Waiver. There will be no walk-ups permitted. "
http://arizona.diamondbacks.mlb.com/ari/ticketing/bark_park.jsp