Personally, I would never feed SD - chock full of fillers, fragments, allergens etcetera. It really is not the best quality food.
If you're going to feed kibble, look for grain free, high protein - like Orijen, Innova EVO, Nature's Variety Instinct. If you want some grain - there is Canidae, Evangers, Wellness etcetera.
If you go the dog food analysis site - look at 5 & 6 star foods - and don't shy away from higher protein unless your dog has liver/kidney disease. High protein is what they are meant to consume and meant to digest. Here is a GREAT educational paper on canine nutrition, it is really wonderful:
http://www.championpetfoods.com/orij...hite_paper.pdf