That's just terrible, someone takes something of yours that you love and worked hard to pay for!!. I tell you the perp is lucky that the owner didn't catch him in the act!!, he'll be wishing he got nabbed first and safe in jail at that point.
Nowadays there's not a lot of defense to prevent this. I've seen film of these guys carrying battery powered saws all, so they just cut through any steel locks instantly. Well I still say My "Rottweiler" is better than any security system out there!!.