Thanks for the input Xamen - appreciate it. Both of my dogs are well socialised with people and other animals, they are already good property watchdogs/guardians in that they are very alert, vocal and intimidating when visitors arrive. I just wanted them tested to see if they would genuinely protect in a more realistic situation. I want to propogate the old type of Neapolitan Mastiff with more emphasis on this and health in any breeding programme that I attempt.