Nancy M,
I don’t think there is one correct way. You could start for the first few months of slow transitions between some of the foods you pick for your rotation and use probiotics to help “build up” the gut. Then after a while, you can try switching foods without a transition. Change every bag or change 3 or 4 times a year or even have 2 or 3 different foods open at once so you can feed a different food for each meal. I use different toppers – cans, freeze-dried/dehydrated, raw. No particular pattern. Just whatever I feel like grabbing. I don’t fast the dogs each week like HDM does.
