An infrastructure and methodologies to support automated lost and found pet alerts based on geo-proximity and other criteria. In various embodiments, a pet/dog owner initiates a lost pet alert by entering location and lost pet report information via a downloadable application. This information is processed and stored in a database maintained by a cloud/remote server. The server identifies potential recipients for a lost pet alert and transmits alerts for display on user devices meeting select criteria such as proximity thresholds. Upon receiving a found pet report, the server sends an automated found pet notice to the owner of the animal and other users meeting predetermined criteria. Curated listings of lost and found pet notifications may also be maintained for selective presentation on user devices.