I have always heard the same thing about eating less feed. I have done it some back years ago but really couldn't tell you one way or the other. I think it would depend on the dog.
I fed anAB for a while named "Reload" and I doubt seriously if you could fill him up. It was an amazing thing to watch that dog eat. He could eat all I ever fed him and 15 minutes later do it again!

Sound familiar Britt??