Ringo - here's something else to consider:
One gram of protein or carb supplies 4 calories, while one gram of fat supplies 9. If you are feeding a fattier food, you need to feed less of that food because of the higher caloric content.
While the jury's out about whether corn is or is not a problem for dogs (Solid Gold advertises that they don't include corn because of the reported negative effects of corn in dog's diets.
I honestly dont have a clue ), I agreed with the poster about Royal Canine not because i don't think Royal Canine to be a good mid- grade dog food, but because there's a growing epidemic of obesity among pet dogs - especially so with toy dogs!
When I brought Bun into the specialized vet center during his Addisson's crisis, the first remark the internist made was "wow! a fit Yorkie! I don't recall the last time I saw one of these!" More recently, my regular vet opt Bun's Pred dose by 1 mg, while this had indeed helped him, it has also added to his hunger pains. I remarked to my vet that I thought Bun was getting a bit chubby as I could no longer see his ribs. My vet laughed and said " you are probably the only client I have who would ever say that!" See my point?