These are great tips! The only one we don't think is necessary is (mouth open wide, lips flipped out) because with laid-back breastfeeding, side lying, and assymetrical latching its just not necessary. Good latching is all about good positioning.
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Solid Food Chart for Babies Aged 4 months through 12 months - Find age appropriate foods for all baby food stages on this simple to read baby food chart - this is a great guide for when to introduce what.