i've been looking for some good dry dog food to feed my Shih Tzu puppy. i want his coat to be nice and shiney, so would canned dog food have more better stuff in it that dry dog food? this is the dry dog food i'm thinking of getting. http://www.petco.com/product_info.a...&c3=196&ct1=Food&ct2=By+Brand&ct3=Royal+Canin can anybody recommend a good canned dog food? or should i stick with dry? why?