I am a tad confused by the effects these have on dogs.... I was under the impression that cerials should be kept to a minnimum because dogs are not intended to eat these really AND I was under the impression that they may make dogs hyper? I was reading on a different forum that said unless a dog is a working dog it should not have a high protein diet AND that high protein makes dogs hyper. Hmmmm so low protein and low carbs.... Are they expected to go veggie LOL, That isnt a very dog like thing to do either. I hear folks say that carbs give you energy although I have also heard that carbs are better eaten at night because they make you feel sluggish. All this info is way too confusing!
You're reading too far into things. It isn't as simple as "_____ makes dogs or people hyper" and "______ makes dogs or people lethargic".
Cereals (grains, etc.) are a source of carbohydrates. Some people think they are necessary in a healthy canine diet, other people disagree. If you choose to feed cereals, you want to keep it to a minimum (for a dog).
Animal tissue (meat) is a source of protein. You want the majority of your dog food to be a specifically named animal protein source, such as "chicken meal".
Low protein/low carbs is a pretty dangerous diet for a healthy dog. You want to have high protein/low carb, ideally. High protein diets are
good for dogs and I highly doubt they could make a dog "hyper".