Feeding and mouth development in the first year
11 August 2026 · 5 min read
How a baby feeds — breast, bottle, and the move to solid food — shapes jaw growth, breathing and tongue posture from the start.
Breastfeeding and jaw growth
Breastfeeding requires active muscle work that gently shapes the dental arches and encourages nasal breathing and correct tongue posture. Where breastfeeding is not possible, paced bottle feeding with a slower-flow teat comes closest to that muscle effort.
Introducing solids and chewing
From around 6 months, textured foods encourage chewing with the back teeth and tongue, which helps the jaws widen and the muscles strengthen. Over-reliance on purées beyond 8–9 months can slow this development, so move toward soft lumps and finger foods at your baby's pace.
Cups, straws and tongue posture
Moving from a bottle to an open cup from 12 months, and adding a straw cup, supports mature swallowing and keeps the tongue up against the palate. Long-term spouted cups or 360 cups can keep the tongue low and encourage mouth breathing, so we prefer open or straw cups.
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