A friend had a Rotty. The dog would sit on his own special dog bed in the lounge room with company. When he got bored, he would getup and quietly walk out to the kitchen, take ONE doggie chunk (about the size of the first joint of my thumb) from the dry food bowl, bring it back to his spot, then spend several minutes carefully chewing it. Then he would go back and repeat the process, and again, and again, and again...