I was so afraid of my babies being dog knapped,although they are with me 24/7,you hear so much of it latley.I joined the missing pets bureau for £99.(per dog). It is a fantastic organisation because for that £99 my babies are members for life, they sent me DNA kits, which i used and sent back to them so their DNA is on record.They also advertise on the internet, supply and put up posters and ring all the animal shelters an police in uk,in the event of your baby being stolen.I think they also offer rewards for the safe return of your dog.I highly reccomend them,its money very well spent! Also ive heard that dogs shouldnt have your telephone number or address on their name tags,as apparently the thiefs could then start ringing you asking for ransom money.With Missing pets bureau,you get a little tag,with MSP on the front with emergency telephone number and your dogs personal ID number on the back.Therefore if someone finds your baby they ring MPB and quote the ID number.I think its quite a good way! thanks for the post,sorry for me rambling on!  

 i'll go before i bore you to tears! lol  
