Hi (?),
We have a lot of information regarding iron overload and IR/PPID in the files here:

http://pets.groups.yahoo.com/group/EquineCushings/files/Iron%2C%20Iron%20Testing%2C%20Iron%20Overload/

Would you please sign your posts with your name, general location and year of joining the group. Thanks for your help with this.

Lavinia, Dante, George Too and Peanut
Jan 05, RI
EC Support Team