Breast Aversion: Caused when an infant is having difficulty at the breast and the breast/chest feeder tries to push or force the baby onto the breast. This can really backfire. Always wait until the dyad is calm and happy- it's never worth it to force a baby onto the breast.
When to Start Bottle Feeding? Ideally, at 4-6 weeks postpartum, when breastfeeding is "well established" meaning everything is going great and mom has a good milk supply. That's in an ideal world, but meet the needs of the family first.
What about Nipple Shields? Because nipple shields require fitting, a dyad should always see an IBCLC before using one. They can be helpful for getting a bottle fed baby back on the breast, or with inverted nipples. Shields should only be used for sore nipples/latch problems if all other assistance from an IBCLC hasn't resolved the issue, such as helping with positioning and latch. Milk transfer should be evaluated if a nipple shield is given, as the wrong size can interfere with milk transfer. While they can be beneficial in certain situations, they should be used judiciously as they can also make breastfeeding more challenging, especially in public.