we have been feeding our dogs Iams ever since we got them. We went to our local Petsmart one day and were offered to try Blue Buffalo. We know that we need to give them small samples of food before changing it all together. But I don't know if that's the food we want to give them. We are currently using Iams Proactive Health. Does anyone use anything different? And is any one food better than another??? Please let me know.