Disclaimer: Compiled from many sources and is intended to warn/alert/advise any new/current/future breastfeeding mothers who intend to continue a breastfeeding relationship. Not intended to offend those who solely/partially/sparadically Formula feed.

http://www.breastfeeding.org/bfacts/bottle.html

Letting the mother have a well deserved rest after a long delivery.
Settling a hungry baby who is difficult to feed.
Give the mother's sore nipples a rest.

But studies show that "just one bottle" can be harmful to both the mother and baby by:

1. Increasing the likelihood of serious allergy to cows' milk protein.
2. Increasing the chance of bowel infection and diarrhea by changing the pH of the bowel. It may take up to a month to return to normal, safer levels.
3. Causing nipple confusion--having difficulty latching to the breast.
4. Affecting the delicate supply and demand balance.
5. Increasing engorgement by not emptying the breasts.
6. Decreasing the mother's confidence in her ability to feed her baby.
7. Reducing the duration of breastfeeding.

http://www.lactinv.com/just_one_bottle.htm

-Causing nipple confusion, flow confusion or flow preference. Bottles and breasts don’t feel the same in the baby’s mouth, nor do they flow at the same rates.
-Affecting the delicate supply and demand balance. Delays in feeding at the breast will result in a decrease in production of mother’s milk.
-Increasing expectations of an infant for “more”.
-Changing the infant’s suck (may not be as effective at breastfeeding)

http://www.drjaygordon.com/bf/supplement.htm

In susceptible families, early exposure to cow’s milk proteins can increase the risk of the infant or child developing insulin dependent diabetes mellitus

http://www.breastfeeding.com/all_about/all_about_confusion.html