Pet tags with phone numbers are public forever.
A printed number can be misused, and the finder still may not know what information the owner needs first.
A finder scans the collar tag, sends a private message and can share context without seeing the pet parent's phone number.

A printed number can be misused, and the finder still may not know what information the owner needs first.
The scan page supports pet found, pet looks lost and pet injured messages, then opens a temporary reply thread.