SOLID GOLD King Wolf...
Rocco has a very sensitive stomach and I thought, ROYAL CANIN for boxers...must be great. I tried him on it, and his stomach was worse then when I had him on SD. Not only was his stool complete liquid (sorry for the graphic), but he had the worst gas ever. I fed this to him for a month or so and finally got tired of having to get the house out everytime he went to the bathroom. I was able to return the unused portion to the store and get my money back which worked out great. I have since been feeding Rocco Solid Gold King Wolf. He loves it, and although there seems to be alot coming out when he goes, his stool has been solid. I also mixed in canned pumpkin (100%) which helped with the food switch and may be the cause for the excesive amount of waste.
Good luck in making your decision, BW has some great threads that can help you figure out what will work best for you and your pup.