Please help, my boerboel cross labrador is 6 years old and is an absolute greedy guts. He eats his food and then sneaks around and eats my other dogs food (also a boerboel 18 months old). How can we stop him from eating and eating and eating. We feed both of our dogs 3 times a day and the recommended amount. The greedy dog needs to be on ultradog low calorie cos he is overweight. The puppy is on royal canine large breed mobility.