Severe iron deficiency anemia treatment in special needs children?(running out of options!)?

My daughter is 4 1/2 and we have tried iron rich food, iron supplements, everything PO that we could, we moved on to IV iron but after several treatments she developed an allergy to it. We just recently tried a different form of IV iron but that had no effect on her at all. Now the docs are telling me that the only option we have left is regular blood transfusion which is very risky. I have been told that whenever I take her in to get a transfusion I must realize that I may not be taking her home with me. I am desperate to find out if there is any alternative that anyone knows of. Anything is better than the reality that I am currently faced with, please help and thank you.