I hope you have a good reason to want a guard dog. You can read in the news almost every week about a dog getting at some kid and either chewing them up badly or in a rare case killing them. You better have yourself prepared for a lot of careful training if you don't want to lose everything you have for allowing your dog to harm some one. I personally would not own a dog that bit. Too risky. A barker would be a better choice. You could get yourself a neat small dog that would either warn you or ward off some intruder. Try a Border Collie and buy a couple of pistols to have around the house.
