I have a 7 3/4 month old son who weighs 10.2kg. He eats all fresh vegetables for dinner, yogurt for lunch, cereal for breakfast and has 3 bottles of formula a day. He was only 7lb 10oz born but has grown into a little giant. He is now crawling and I have been assured that once he is walking that he will loose his "baby fat".
So don't worry. I am sure that you would rather your daughter to be healthy and be a big bubba than to not eat and be sick all the time.
Belinda, NSW, 8mth baby boy