I noticed in the 'popular brands' thread that a lot of people seem to rotate food, either different flavors within the brand or totally different brands. Do you do the blending thing every time? Where you take 7+ days to switch over, slowly mixing the new food in? I imagine not, but I thought I'd check. I never did that in the olden days of 'before the internet' with my dogs, but it seems to be almost mandatory now.
What has your experience been like?