K so I have to say that six weeks ago I would not have understood a single thing in your original post... but you just helped me realize in my clin lab class... I'm actually learning something! I can not believe that I just read that and understood everything, even the processes behind what's happening and why it happens...

I'm very sorry for your kitty though and I have no experience with this except we have practicals tomorrow over PCV and TP and have to calculate the MCH, MCV, MCHC, etc

I will have you in my thoughts and pray that she will recover

EDIT: Yes, excess iron is toxic for cats, so I would hold off on that until you get more information. If you would like, I can talk to my Clin Lab instructor tomorrow and ask her about iron supplements for cats, she should be familiar with it. Though from my understanding the erythropoetin injections should be the most helpful since that's what stimulates RBC creation, not necessarily iron (which only supports hemoglobin). But iron shouldn't hurt in addition. Regardless if you would like I'll talk to my instructor tomorrow to ask her opinion, can't hurt right? She is a DVM.