Any social application will help you more for this.
If you want to find a great solution for this problem so you can use pet tags for your pets. Pet tags contains complete information of pet and pet owner's also this will help to over come this situation.
Any Missing you are most welcome to post a flyer on my facebook rescue/crossposting page at Itsarufflife Shepherd. I will circulate that for you. Posting it on my page everyday is welcome. It will be seen by many and shared by many ~~ all over ~~