We have raised 7 Caucasians and that is the method I use with all of them. Only have to do it once when they are about 3 months old and the behavior is corrected. After that we can hand feed them, put hands in the bowl and stir their food around and even take it away.  No aggression issues.

@ Knoave Now that the dog is mature we will have to try something else.  I know that Jessica at Mastini Mayhem just went through this with a 160 pounds Neo.  I will invite her to post but I do have some ideas which I will share this evening after work.