I voted rotate because, I've heard that it's supposed to be good for the little ones to have variety. And on top of that, who would want to eat the same thing over and over and over? Tigger does really well with change, he started out on IAMS (Yuck
) switched to Nutro Ultra Puppy, from there went to Nutro Puppy lamb and rice and is now on Royal Canin Puppy 33. I haven't switched it in quite some time, so I might this next time. He also gets wet food, once a week. treats usually once a day and very little human food.