:Thanks for all the suggestions everyone! We aren't looking for a guard dog. We have a german shepherd at home for that and she does a great job. The only problem is she can't come on walks with me due to her bad joints, so any large laid back dog that wouldn't stand idly by while I am mugged to death at the end of it's leash would work wonderfully.
Ahh, I do love the greys, and everyone needs to have a security system for their cushy furniture. SisMorphine, that is one awesome picture. I think it may convince my husband that greys actually do have teeth in their mouths.