To find the most up-to-date information, I recommend checking these resources:
* Arizona Department of Agriculture: They may have statistics on animal populations.
* Local Animal Shelters and Humane Societies: Contact your local animal shelter or humane society, as they often track the number of dogs in their area.
* The American Kennel Club: While they might not have a specific estimate for Arizona, they may have national statistics that could be helpful.
Remember, these are just suggestions, and you may need to search further for the most accurate and current data.