It’s 3am, the baby is screaming, and your partner is holding a bottle they’ve warmed while you try to decide whether giving it to the baby means “ruining” breastfeeding. The guilt is suffocating. Every NCT leaflet says breast is best, your health visitor mentioned something about nipple confusion, and the mum in your WhatsApp group exclusively pumped for 14 months. Meanwhile, you’re exhausted, sore, and struggling. Here’s the thing nobody says loud enough: combination feeding — using both breast and bottle — is a completely valid way to feed your baby, and for many families it’s the approach that works best.
In This Article
- What Combination Feeding Actually Means
- Why Families Choose Combination Feeding
- When to Start Combination Feeding
- Choosing Bottles and Teats
- How to Introduce a Bottle to a Breastfed Baby
- Maintaining Your Milk Supply
- Formula Feeding Basics
- Combination Feeding Schedules by Age
- Common Challenges and Solutions
- Getting Support
- Frequently Asked Questions
What Combination Feeding Actually Means
Combination feeding (also called mixed feeding or combi feeding) is any arrangement where a baby receives both breast milk and formula. There’s no single way to do it — it’s flexible by design:
Common Approaches
- Breastfeed during the day, formula for the evening/night feed — lets a partner take the night shift so the breastfeeding parent can sleep
- Alternate between breast and bottle — every other feed, or breast for most feeds with one or two formula bottles
- Breast milk in bottles — pumping and bottle-feeding expressed milk, sometimes mixed with formula feeds
- Formula top-ups — breastfeeding first, then offering a small formula bottle if the baby is still hungry
It’s Not All or Nothing
The biggest myth in infant feeding is that it has to be exclusive. Exclusive breastfeeding or exclusive formula — as if those are the only two options. In reality, any amount of breast milk benefits your baby, and supplementing with formula doesn’t erase those benefits. The NHS supports combination feeding as a perfectly acceptable approach.
Why Families Choose Combination Feeding
Practical Reasons
- Returning to work — expressing at work isn’t always practical. Formula during childcare hours and breastfeeding at home is a common pattern
- Shared responsibility — a partner can feed the baby, giving the breastfeeding parent a break. This isn’t just convenience — it’s mental health preservation
- Insufficient milk supply — some parents don’t produce enough milk for the baby’s needs. This happens more often than the “your body makes what your baby needs” messaging suggests. Topping up with formula ensures the baby is fed
- Multiple births — feeding twins or more exclusively from the breast is heroic but not always sustainable. Many twin parents combine breast and bottle from early on
- Medical reasons — certain medications, surgery recovery, or health conditions may limit breastfeeding temporarily
Emotional Reasons
- Reducing pressure — the expectation to breastfeed exclusively causes anxiety and guilt in many new parents. Combination feeding removes the all-or-nothing pressure
- Maintaining some breastfeeding — parents who would otherwise stop breastfeeding entirely can continue part-time through combination feeding. Some breast milk is better than none
- Enjoying feeding — when breastfeeding is painful or stressful, switching some feeds to bottles can make the remaining breastfeeds more pleasant
The Guilt Problem
Let’s address this directly: there is enormous cultural pressure to breastfeed exclusively, and parents who combination feed often feel they’re failing. You’re not. A fed, thriving baby and a functioning parent is the goal. The specific liquid in the bottle matters far less than the well-being of the family. Every feeding method involves trade-offs, and the right choice is the one that works for your specific situation.
When to Start Combination Feeding
The Traditional Advice
Most midwives and health visitors recommend waiting until breastfeeding is “established” before introducing bottles — typically around 6-8 weeks. The reasoning is that early bottle introduction can cause flow preference (the baby finding the faster bottle flow easier and refusing the breast).
The Practical Reality
Many families start combination feeding earlier out of necessity — low milk supply, feeding difficulties, or the breastfeeding parent’s need for sleep and recovery. Starting earlier doesn’t automatically mean breastfeeding will fail, but it does require more attention to technique:
- Use a slow-flow teat — this makes the baby work for the milk, similar to breastfeeding effort
- Practice paced bottle feeding — hold the bottle horizontally rather than tipping it up, pause every few minutes, and let the baby control the pace. This prevents the baby gulping and developing a preference for the faster bottle flow
- Continue offering the breast — even if the baby seems to prefer the bottle initially, keep offering breastfeeds. Many babies happily switch between both
For bottle recommendations, our guide to best baby bottles covers anti-colic options and slow-flow teats designed specifically for combination feeding.
Choosing Bottles and Teats
Teat Shape Matters
For combination-fed babies, the teat shape should mimic the breast as closely as possible to reduce confusion:
- Wide-necked, breast-shaped teats — brands like Tommee Tippee Closer to Nature, MAM, and Lansinoh design teats that replicate the breast shape
- Slow-flow teats — essential for combination feeding. Standard flow teats deliver milk too quickly, making the baby expect the same speed from the breast
- Anti-colic systems — bottles with air vents (MAM, Dr Brown’s) reduce the amount of air the baby swallows, decreasing wind and colic symptoms
Practical Recommendations
- Tommee Tippee Closer to Nature (about £8-12 for a 2-pack) — the UK’s most popular combination feeding bottle. Wide, breast-like teat, easy to clean, widely available from Boots, Amazon, and supermarkets
- MAM Easy Start Anti-Colic (about £10-14 for a 2-pack) — flat teat shape that some babies prefer, self-sterilising in the microwave. Good for parents who want minimal equipment
- Lansinoh mOmma (about £8-10) — designed by a breastfeeding company. The NaturalWave teat encourages a natural latch. Less widely stocked but available from Amazon and specialist baby shops
How Many Bottles Do You Need?
For combination feeding, 4-6 bottles is usually enough — you’re not bottle-feeding exclusively, so you don’t need a huge supply. Buy 2-3 initially to check the baby accepts the teat shape before investing in more.
How to Introduce a Bottle to a Breastfed Baby
Some babies take a bottle immediately. Others act as though you’re offering them poison. Patience is key.
Tips That Work
- Let someone else offer the first bottle. Babies associate the breastfeeding parent with the breast. If you’re holding the baby and offering a bottle, they can smell your milk and wonder why you’re not using the usual system. A partner, grandparent, or friend offering the bottle while you’re in another room often works better
- Try when the baby is calm but hungry — not starving. A frantically hungry baby has no patience for new things. Offer the bottle at the first hunger cues, not after 20 minutes of crying
- Warm the milk. Breast milk comes at body temperature. Formula or expressed milk from the fridge feels cold and unfamiliar. Warm it to 37°C — test a drop on your inner wrist
- Try different positions. Some babies won’t take a bottle in the cradle hold (breastfeeding position) but will accept it sitting more upright or facing outward
- Don’t force it. If the baby refuses, stop and try again later. Forcing creates a negative association with the bottle that makes subsequent attempts harder
If the Baby Refuses
- Try a different teat shape — babies have preferences. What works for your friend’s baby may not work for yours
- Try a different time of day — some babies accept bottles more readily in the morning when they’re rested
- Dip the teat in breast milk — the familiar taste can encourage acceptance
- Be persistent but not forceful — it can take 5-10 attempts over several days before a breastfed baby accepts a bottle
Maintaining Your Milk Supply
Breast milk production works on supply and demand — the more milk removed, the more your body produces. When you replace breastfeeds with formula, supply naturally decreases. If you want to maintain your breast milk supply while combination feeding:
Strategies
- Drop feeds gradually — replacing one breastfeed with formula every few days gives your body time to adjust without engorgement or blocked ducts
- Keep the feeds that matter most — morning and evening breastfeeds tend to be the most enjoyable for parent and baby. Drop midday feeds first if you’re returning to work
- Express when you skip — if you replace a breastfeed with formula, pumping at that feed time tells your body to keep producing. You can store the expressed milk for later
- Night feeds boost supply — prolactin levels peak at night, so night breastfeeds are particularly effective for maintaining supply. Counterintuitively, keeping the night breastfeed while giving formula during the day often works better for supply than the other way around
Accepting Natural Reduction
If you’re combination feeding and your supply reduces, that’s okay. Any breast milk your baby receives has immunological and nutritional benefits. Going from 100% to 50% breast milk still gives your baby significant benefits. Don’t pump yourself into exhaustion chasing a supply level that stresses you. Our guide to sterilising baby bottles covers the hygiene essentials for expressed milk storage.
Formula Feeding Basics
Which Formula?
First infant formula (stage 1) is suitable from birth and is the only formula babies need until they start solids. In the UK, all formula meeting UK infant formula regulations is nutritionally complete. The price difference between brands reflects marketing, not quality:
- SMA PRO First Infant Milk — about £12 for 800g
- Aptamil First — about £13 for 800g
- Cow & Gate First — about £10 for 800g (Cow & Gate and Aptamil are made by the same company)
- Kendamil — about £14 for 800g. British-made, uses whole milk rather than skimmed. Popular with parents who prefer a “less processed” option
Preparing Bottles
- Boil fresh tap water and let it cool for no more than 30 minutes (the water should still be above 70°C to kill bacteria in the formula powder)
- Pour the correct amount of water into a sterilised bottle
- Add the formula powder using the scoop provided — level scoops, not heaped. Follow the pack instructions exactly
- Seal and shake well to dissolve the powder completely
- Cool quickly by holding the bottle under cold running water. Test the temperature on your inner wrist before feeding
Storage Rules
- Freshly made formula can be kept at room temperature for up to 2 hours
- In the fridge — use within 24 hours. Store at the back of the fridge, not the door
- Never reheat formula that the baby has already partially drunk — saliva introduces bacteria that multiply at room temperature
- Ready-to-feed cartons are sterile until opened — useful for night feeds and travel. More expensive (about £1-2 per feed) but zero preparation
Combination Feeding Schedules by Age
These are examples, not rules. Every baby is different, and the best schedule is the one that works for your family.
Newborn to 6 Weeks
If combination feeding from early on:
- Breastfeed on demand (typically 8-12 times per day)
- Introduce 1 formula bottle per day — usually the last evening feed. This lets a partner take over while you rest
- Keep all other feeds at the breast to establish supply
6 Weeks to 3 Months
- Breastfeed 6-8 times per day
- 1-2 formula bottles — evening and/or one overnight feed
- Adjust based on your situation — if returning to work is approaching, gradually increase bottles
3-6 Months
- Breastfeed 4-6 times per day — morning, after naps, and evening
- 2-3 formula bottles — during childcare or midday feeds
- Express if needed to maintain supply for the breastfeeds you want to keep
6+ Months (After Starting Solids)
- Breastfeed 3-4 times per day — morning, evening, and before sleep
- Formula for remaining milk feeds — alongside solid meals
- Solids gradually replace milk feeds over the second half of the first year
For safe sleep guidance alongside feeding, our guide to room temperature for baby sleep covers recommendations for every season.
Common Challenges and Solutions
Baby Prefers the Bottle
The faster flow from a bottle can make babies impatient at the breast. Solutions:
- Use slower-flow teats — move back to newborn flow if needed
- Practice paced feeding — hold the bottle horizontal, let the baby suck 3-4 times, then tilt the bottle down to pause the flow
- Offer the breast first when the baby is calm and not desperately hungry, then top up with the bottle
Baby Refuses the Bottle
Common in babies who’ve been exclusively breastfed for several months:
- Try different teats — the shape, flow, and material all matter to some babies
- Have someone other than the breastfeeding parent offer it
- Try a cup instead — from around 6 months, some babies prefer an open cup or sippy cup to a bottle
- Try expressed breast milk before formula — the familiar taste reduces one variable
Engorgement When Dropping Feeds
When you replace a breastfeed with formula, your breasts may feel full and uncomfortable:
- Express just enough for comfort — not a full pumping session, which would signal your body to maintain production
- Use cold cabbage leaves in your bra — sounds odd but the cool, curved leaves relieve pressure
- Take ibuprofen if needed for the discomfort — it’s safe during breastfeeding
Guilty Feelings
Talk to other parents who combination feed. You’ll find they’re everywhere — most just don’t talk about it because of the cultural pressure around exclusive breastfeeding. Online communities, local support groups, and the National Breastfeeding Helpline (0300 100 0212) all support combination feeding, not just exclusive breastfeeding.
Getting Support
NHS Services
- Health visitor — your assigned health visitor can help with feeding plans and weight monitoring. They should support whatever feeding method you choose
- GP — if you’re struggling with milk supply, mastitis, or feeding-related mental health difficulties
- Infant feeding team — many NHS trusts have specialist infant feeding coordinators. Ask your health visitor for a referral
Helplines and Charities
- National Breastfeeding Helpline — 0300 100 0212. Free, confidential, staffed by trained volunteers. Open 9:30am-9:30pm daily
- Association of Breastfeeding Mothers — 0300 330 5453
- La Leche League GB — 0345 120 2918
- NCT — local support groups and one-to-one peer support
Online Communities
- Mumsnet — active feeding forums with honest, experience-based advice
- Facebook groups — search for “combination feeding UK” for communities of parents doing exactly what you’re doing
The right support acknowledges your feeding choices without judgement. If a professional makes you feel guilty for combination feeding, seek a different professional. You deserve support, not guilt.
Frequently Asked Questions
Will combination feeding confuse my baby? “Nipple confusion” is an older term that’s fallen out of favour with many lactation consultants. Babies are adaptable — most learn to switch between breast and bottle without problems, especially with paced feeding and appropriate teat selection. Some babies need a few attempts, but outright refusal of one or the other is uncommon.
How do I know if my baby is getting enough milk? Wet and dirty nappies are the most reliable indicator. At least 6 wet nappies per day from day 5 onwards, with pale yellow urine, suggests adequate hydration. Your health visitor will monitor weight gain at regular check-ups. If you’re concerned, ask for a weight check — it’s free and provides reassurance.
Can I mix breast milk and formula in the same bottle? Technically yes, but it’s not recommended. If the baby doesn’t finish the bottle, you waste breast milk (which is harder to replace than formula). Better to offer the breast first or give expressed breast milk in one bottle and formula in another.
Will my milk supply drop if I combination feed? It may reduce somewhat — your body produces less milk when demand decreases. But many parents successfully maintain a partial supply for months. The key is consistency: keep the breastfeeds you want to maintain at the same times each day, and drop other feeds gradually.
Is combination feeding more expensive than exclusive breastfeeding? Yes — formula costs about £8-14 per 800g tin, which lasts roughly a week with partial formula feeding. You’ll also need bottles, teats, and sterilising equipment. Budget about £30-50 per month for formula costs when combination feeding. It’s cheaper than exclusive formula feeding but more expensive than exclusive breastfeeding.