Originally Posted by Saddlebag
I'd stay with the Senior but cut out any vitamin supplements. Seniors is a balanced feed that also aids digestion so feeding the others means you are making expensive poop and possibly overdosing some vitamins or minerals. I start out with just hay and only if the horse should start to lose weight would I add a pelleted feed or oats.
Actually she is underfeeding the senior so it is not providing the needed nutrition as is