Hi Hilary.  I would avoid the high iron one and go with the grass/alfalfa. However, if your horse gets foot sore with alfalfa- then that is something to consider as well, but I'm sure you know that.  I'm not a balancer by any means, so I can't help you with the 50:50 mixing of the hay...I'm sure one of our more experienced will chime in on that piece ...but I also wonder how much zinc and copper would be needed to balance out all that iron? 
--
Trisha DePietro
Aug 2018
NH
Dolly and Hope's Case Histories
Dolly's Photos 
Hope's Photos 
Primary Responder