Prevention is better than cure!!!!!!!
Be carefull who comes to your place and don't brag your dog up too much
CCTV,locks and alarms
and if someone some much as lifts a flower out of your garden unleash a mass pain and fury on them. The scumbags live in a small world and they soon get the picture.
If someone stole one of my dogs it would break my heart and be more than willing to inflict the same heart ache and pain on the culprit.