I wouldn't worry about the differences in nutrition between red meats, fish and poultry as commercial foods are fortified with any missing minerals and vitamins. Be more concerned with what your puppy does best on. If Acana and S&C work well then that's great. It's not wrong to add some wet stuff to dry foods so the dog likes it better - it's a good thing! The dehydrated mixes have a huge amount of veggies which doesn't agree with all dogs so there's that. My dogs definitely do better with lower rather than higher fiber.