It sounds pretty silly doesn't it? I think if your ds is doing well on the S26 then don't swap back again. Just something to think about also, we had our ds on Karicare Gold also, then our paed told us the Gold ones were often too rich and packed with excess stuff they don't need so not to bother spending the extra money but just get the cheaper one. Don't know how true this is, and we stayed with the Gold as ds was settled on it, but it does make you think...