foxinsocks - Nutramigen is a derivative of cows milk although there is not much there, mainly it is palm and soy oil but I think this is why my dietician had to go away and ask as it is very hidden in the ingredients, it says extensively hydrolised casein which, I assume, is what she meant by 'broken down so much it is no longer cows milk'.
"Protein provides 11% of total calories in Nutramigen LIPIL. The hypoallergenic protein source is extensively hydrolyzed casein that is supplemented with three amino acids?L-cystine, L-tyrosine, and L-tryptophan?to provide an appropriate balance of amino acids to the infant. "
and in the ingredients it says this is from milk
"Ingredients: Powder: Corn syrup solids (46%), vegetable oil (palm olein, soy, coconut, and high oleic sunflower oils) (25%), casein hydrolysate (from milk)# (17%), modified corn starch (7%), and less than 2%: Mortierella alpina oil,** Crypthecodinium cohnii oil,?? acetylated monoglycerides, vitamin A palmitate, vitamin D3, vitamin E acetate, vitamin K1, thiamin hydrochloride, riboflavin, vitamin B6 hydrochloride, vitamin B12, niacinamide, folic acid, calcium pantothenate, biotin, ascorbic acid, choline chloride, inositol, calcium citrate, calcium hydroxide, calcium phosphate, magnesium oxide, ferrous sulfate, zinc sulfate, manganese sulfate, cupric sulfate, sodium iodide, sodium selenite, sodium citrate, potassium citrate, potassium chloride, L-cystine, L-tyrosine, L-tryptophan, taurine, L-carnitine."
I agree that blood in the stools is not a minor problem and that the OP should be very careful but it is awful that the OP is being told to give up bf and being made to feel that she is poisoning her without being given the option of restricting her diet. I am sure this formula works for lots of people but there must be a choice, albeit with the guidance of the healthcare professionals.