We really need to see your case history to be able to help more effectively. Your diet is going to play a major role in what we suggest.
Why is he on Red Cell? This is a supplement for iron and there has never been a documented case of an adult horse being iron deficient unless there has been catastrophic blood loss. Many horses, esp those with PPID and IR, are already iron overloaded.
Lavinia, Dante, George Too and Peanut Jan 05, RI EC Support Team