Blue buffalo for my dobie and chihuhua. I fed the chihuhua science diet for years. When i adopted my doberman i really researched the food and found out that science diet was crap. I noticed an improvment in both of their coats within 2 weeks of changing their food. My 10 year old chihuhua's coat became silky and whatever the doberman rescue was feeding her gave her dandruff which disappeared within a couple weeks after the change