Dog food companies are required to list the contents of the bag in order of volume-it is the first three ingredients that you want to pay attention to. If the first or second ingredient listed is a high quality protein source then you have chosen a premium pet food, if the first two or three ingredients are grain, you have chosen a filler feed and will have to feed your dog far more to give adequate nutrition. You will also have a dog that produces far more stool volume. There are many advantages to paying more for a quality feed, one being a dog that looks and feels and thinks better for a longer healthier lifetime. Dogs are creatures of habit and if they know the rules of their surroundings are constant, they function much better.
Dogs learn easier and faster with positive motivation.
Praising a dog needs to be done at the appropriate time and given properly to have the desired affect. Correction had to be given immediately to be understood and to be effective. Reprimanding a dog even a few minutes after the fact had no effect on changing the undesired behavior. Problem behavior is often corrected through positive training time spent with the dog. Dogs do not behave out of spite.