Please don't take this personally, I'm not trying to offend anyone. I find it intriguing that people buy a ready-made carefully balanced feed and then start adding lots of other things to it. Why? If your horse has a particular deficiency of some sort, I can understand it but the feed manufacturers go to a lot of trouble to balance their feeds and if you pick the right mix and feed in the recommended amounts, they should contain everything that the horse needs. In the old days skill was needed to strike a balance between the different feedstuffs, now it is done for us, yet we still seem to have this hangover from those days about adding a bit of this or a bit of that. It worries me that because a lot of the 'old' knowledge has gone and people don't have faithful old family grooms that have spent a lifetime with horses, they run the risk of unbalancing these feeds which can actually do more harm than good. This is my particular 'soapbox' by the way, in case you hadn't noticed! Apologies once again if I have offended anyone, I just think that it is an important point to remember.