How do you know he was stollen from your yard? How do you know that they lost him? I ask because I let all my dogs play in my yard. I do know if your yard has a gap in your fence they will find it! I was lucky my first schnauzer would find a way out all the time so I got a new fence with RR ties. My knew guy is 7mo. and very small and he found a gap thank God my bulldog let me know and I found him. They are so prey driven you have to be so so careful! I pray you find him I lost my Rio last year he was 17 he died of oldage.