Formula Feeding Your Baby: How to Do It Safely and Confidently

Advice
Written By Bobbi Daly

However you have come to formula feeding — by choice, by necessity, or somewhere in between — this post is written for you. It covers safe preparation, responsive feeding, how much formula your baby needs at different stages, and when to get support.

As an IBCLC based in Listowel, Co. Kerry, I work with formula feeding families regularly. The questions I hear most often are not about whether formula is the right choice — they are about how to do it well. That is what this post is for.

How to Prepare Formula Safely

Formula preparation should have been covered with you before you left hospital. If you feel uncertain about any aspect of it — the water temperature, the measurements, or how to sterilise equipment — the two most reliable sources of guidance are:

World Health Organisation: Safe Preparation, Storage and Handling of Powdered Infant Formula

Both are free, clear, and up to date. If in doubt, always follow the manufacturer's instructions for the formula you are using, and use the scoop provided — not a substitute.

How Much Formula Does My Baby Need?

Every baby is different, and appetite varies from feed to feed and day to day. The following is a rough guide only — always follow your baby's hunger and fullness cues rather than trying to reach a set amount.

Newborn to two weeks: Around 60–90ml per feed, every two to three hours.

Two weeks to two months: Around 75–105ml per feed, roughly six to eight feeds in 24 hours.

Two to six months: Around 150–210ml per feed, roughly five to six feeds in 24 hours. Total daily intake is usually around 150ml per kilogram of body weight.

Six to twelve months: As solid foods are introduced, formula intake gradually decreases. Most babies at this stage take around 500–600ml per day alongside solids.

These are guidelines, not targets. A baby who consistently takes significantly more or less than expected, or who seems unsettled after feeds, is worth getting checked.

Do You Need Follow-On Formula?

No. Follow-on formula — marketed for babies from six months — is not recommended by the WHO, the HSE, or any major health authority as a necessary product. First infant formula is suitable from birth right through the first year.

Follow-on formula exists as a marketing product. Formula companies are not permitted to advertise first infant formula directly to parents, but they are permitted to advertise follow-on formula — which is how the product came to exist in the first place. You do not need to switch at six months unless advised to do so by a healthcare professional for a specific clinical reason.

What Is Responsive Bottle Feeding?

One of the most important things you can do when formula feeding is feed responsively — following your baby's cues rather than the clock or the volume in the bottle.

Watch for hunger cues: rooting, turning the head, bringing hands to mouth, becoming more alert. Crying is a late hunger cue — try to catch your baby before they reach that point.

Watch for fullness cues too: slowing down, turning away from the teat, relaxing the hands, becoming drowsy. When your baby signals they are done, stop the feed — even if there is formula left in the bottle. Encouraging a baby to finish a bottle they do not want can override their natural hunger and fullness signals and lead to overfeeding over time.

What Is Paced Bottle Feeding and Why Does It Matter?

Paced feeding is a technique that slows the flow of a bottle feed down, making it closer to the pace of breastfeeding. It is beneficial for all bottle-fed babies, not just breastfed babies.

To pace a feed:

  • Hold your baby in a semi-upright position, not lying flat

  • Hold the bottle horizontally rather than tipping it up steeply

  • Allow your baby to draw the teat into their mouth rather than pushing it in

  • Pause the feed every few minutes by tipping the bottle down — this gives your baby time to register fullness

  • A feed should take around fifteen to twenty minutes

Paced feeding reduces the amount of air swallowed, can reduce symptoms of wind and reflux, and gives your baby better control over how much they take.

How to Wind a Formula Fed Baby

Some babies need more winding than others — there is a lot of individual variation. Winding after a feed, and sometimes partway through, can help if your baby seems uncomfortable.

There is no single correct winding technique. Over the shoulder, sitting upright on your lap with your hand supporting the chin, or lying face down across your lap — try different positions and see what works for your baby.

If your baby seems consistently uncomfortable, is arching their back, or is very difficult to settle after feeds, it is worth getting assessed rather than assuming it is simply wind.

How to Hold Your Baby During a Feed

Bottle feeding is an opportunity for closeness. Holding your baby close, making eye contact, and being present during a feed matters — for your baby's sense of security and for your relationship with them.

Avoid propping a bottle. Babies should always be held during feeds — both for safety and for connection.

Alternate the side you hold your baby on during feeds where you can. This gives them visual experience from both sides, which supports their development.

Common Formula Feeding Concerns

My baby seems very hungry after feeds. Check that you are preparing formula correctly and using the right amount of powder. If preparation is correct and your baby is consistently unsatisfied, speak to your public health nurse or GP.

My baby is constipated. Before anything else, check that formula is being prepared correctly — too much powder relative to water concentrates the formula and reduces your baby's fluid intake, which can cause constipation. If preparation is correct and your baby is still straining, uncomfortable, or producing hard dry stools, speak to your GP.

My baby keeps pulling off the teat. This can be a sign that the teat flow is too fast. Try a slower-flow teat and use paced feeding.

Should I switch formula brands? Switching formula unnecessarily is generally not recommended. Most babies do not need a specialist formula, and frequent switching can upset the gut. If you are concerned that a formula is not suiting your baby, speak to your GP or public health nurse before making a change.

Frequently Asked Questions About Formula Feeding

Can I make formula bottles in advance? Current guidance recommends making formula fresh for each feed where possible, using water that has been boiled and cooled to 70°C. If you need to prepare bottles in advance — for example overnight or when going out — they can be stored in the back of the fridge for up to 24 hours. Never leave a made-up bottle at room temperature. Reheat by placing in warm water rather than using a microwave, which heats unevenly.

How do I know if my baby is hungry? Watch for early hunger cues — rooting, turning the head, bringing hands to the mouth, becoming more alert and active. Crying is a late sign of hunger. If you can catch your baby before they reach that point, feeds tend to go more smoothly.

My baby is taking less formula than the guidelines suggest — should I be worried? Guidelines are averages, not targets. What matters most is that your baby is gaining weight steadily and producing adequate wet nappies. A baby who is growing well and seems content is almost certainly getting enough, even if the volume looks low on paper.

Can I reheat leftover formula? No. Formula that has been partially fed should be discarded within one to two hours. Bacteria from your baby's mouth can contaminate the remaining milk, and reheating does not make it safe.

My baby has started refusing the bottle — what should I do?Bottle refusal is more common than many parents realise and can be very stressful, particularly when a return to work is approaching. There are practical strategies that make a real difference — a dedicated bottle feeding consultation can help you work through it systematically.

Is combination feeding an option? Yes — many families use both breast and bottle successfully. Combination feeding takes some planning, particularly around protecting milk supply, but it is absolutely achievable with the right support.

Formula Feeding Support in Kerry and Online

Formula feeding can come with its own challenges — bottle refusal, feeding aversions, concerns about intake, or navigating combination feeding. You do not have to figure it out alone.

I offer one-to-one bottle feeding consultations at my clinic in Listowel, Co. Kerry, home visits across North Kerry, and online consultations for families nationwide. Whether you are exclusively formula feeding, combination feeding, or moving from breast to bottle, I can help you feed your baby with confidence.

Book a Bottle Feeding Consultation →

Book a free introductory call →

Key Sources

Bobbi Daly
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