Formula switching planner

Why most switches feel worse than they are

Three days into a switch, a baby’s stools change and a parent concludes the new formula does not agree with them. Usually it is doing exactly what it should. Stool firmness follows the fat blend, frequency follows the carbohydrate and the prebiotics, and both take about a week to settle wherever they are going to settle.

The reason this tool names the axis instead of saying “expect some changes” is that a change you were warned about reads as adjustment, and the same change unannounced reads as a problem. Switching back on day three, before either formula has settled, is the commonest way a good switch gets abandoned.

When not to bother with a gradual switch

• A severe reaction to the current formula. Stop it and speak to a pediatrician before introducing anything else. Do not taper.
• A recall. Same answer. Check the recall tracker.
• You have run out and have no choice. Switch, and apply the taper backwards if you can once supply returns. A fed baby beats a perfect protocol.

Related

• Switching between formula brands — the full guide this schedule comes from
• Side-by-side comparison — the same two formulas on every tracked attribute, not just the ones that differ
• Reorder estimator — a switch is easier when you are not doing it under supply pressure
• Gas in formula-fed babies — the symptom that prompts most switches, and how often formula is the cause