Abstract: The Potty Pro Collar System is a pet doorway proximity alert system that alerts a pet owner that a pet is residing near a doorway. The system has a sound indicator, a transmitter, and a proximity collar. The proximity collar is worn around the neck of a pet, and has a tag that couples with the transmitter to signal the sound indicator to sound an audible alert. The pet resides near the interior or exterior of a doorway to create an audible alert. The audible alert volume and sounds are adjustable by buttons on the sound indicator. The present invention is useful to alert a pet owner when a pet desires to urinate outside, and may prevent pets from urinating in the interior of a residence.