I had a family member who could have died because she was deathly allergic to the formula! No parent would know until the baby starts to go into anaphylactic shock.
If you are struggling with how to feed your baby please read the articles within this post, search the websites under link list 'Adoption' & 'Lactation' to the right of this post and join local or online support groups.
Disclaimer: The information & knowledge gained from this website is not intended as medical advice. It is intended as a sharing of information from my research and experience. This website is not a replacement for a health care provider & the advice given should not be considered a diagnosis or treatment. Seeking a professional care provider is the responsibility of the reader.