Many dog food manufacturers make several different brands and different flavors, not just Blue. As far as balance of nutrients are concerned, yes Blue is not perfect. There is no perfect one. So to minimize deficiencies or overages, rotate in another brand or two. This should minimize risk. I think those life source bits aren’t evenly distributed or eaten evenly so I can understand why he says that about blue and they did have a recall in 2010 for too much vitamin D. I’ve bought 2 dog foods already that have had a different kibble in the bag from a different recipe. It happens. Few and far between but it does.
