I have Scooter on a feeding schedule for housebreaking and to re-inforce the idea that I'm alpha. I was worried I might be underfeeding him too, so I asked my vet.
My vet sent me to this site:
http://www.peteducation.com/article....articleid=2612 It's an article called
How Much to Feed A Dog to Meet His Energy Needs . Hope it helps!