hi S.;
you got a lot of great advice here. i'll throw in my two cents, why not.
first of all do NOT give the baby formula. i don't know what is wrong with doctors, what this obsession is with formula, it's NOT FOOD. it's like a 3rd rate excuse for food. your child will NOT gain more weight on formula than on breastmilk. your doctor should be applauding you, as i am, for nursing exclusively. all the current research shows that breastmilk far exceeds formula in every way for infant nutrition. stick with the nursing, please.
next, don't worry. many breastfed babies, MANY, do not get interested in food even at a year. it's totally normal. if you want to discuss this more with other breastfeeders, you could go to a La Leche League Intl. meeting in your area. just google the organization, go to "resources", and click on your area and the meeting shcedule will come up. these moms will have the most up to date information and creative ideas for healthy infant nutrition. they can also help you find a new pediatrician who is more supportive and better informed.
personally, i can tell you that niether of my kids ever ate baby food. the were exclusively breast fed, as in no formula ever, until they wanted food. i pureed a tiny bit of stuff, maybe like one or two sweet potatoes, in the beginning, but they were uninterested. they just started eating food that they could hold at about 5 months, which is on the early side, but it was not a problem. like another mom said, give your child what you eat. it's food, not poison.
lastly, try not to get too attached to those percentage numbers. they are really so random. is your daughter happy, active, bright, healthy, having plenty of poo and pee pee, crying tears, sleeping reasonably well? then she is fine. breastmilk is SUCH good nutrition that she really doesn't need any thing else until she asks for it. and she will, when she's ready.
good luck and relax!
J.