Mixed feeding your newborn: everything you need to know

Feeding decisions as a new parent can feel heavy with so much advice coming from every direction. If you're considering or already doing mixed feeding, know that you're making thoughtful choices for your family. Sometimes mixed feeding is what works, sometimes it's what's needed, and sometimes it's simply what feels right - all of these reasons are completely valid.

What is mixed feeding?

Mixed feeding (also called combination feeding) is when you feed your little one with both breastmilk and formula. It can be a wonderful and necessary option for many families.

"For some people, mixed feeding is an empowering choice; for others it may be medically necessary," says breastfeeding specialist and GP Dr Kavita Krishnan. "Your baby will benefit from even small amounts of breastmilk – so you should feel very proud of your efforts. Remember you are amazing, no matter how your baby feeds."

Why should you consider mixed feeding?

Mixed feeding might be right for your family if you're experiencing:

• Breastfeeding challenges - sore nipples, blocked ducts, mastitis, or latch difficulties
• Low milk supply - despite your best efforts with feeding and technique
• Slow weight gain - if your bub isn't gaining the expected weight
• Returning to work - when exclusive breastfeeding becomes difficult with your schedule
• Medical reasons - premature babies or those with medical conditions may need supplementation
• Personal choice - every family's feeding journey is unique and valid.

If you're considering mixed feeding, a lactation consultant or child health nurse can offer guidance tailored to your family's specific needs.

When to start mixed feeding.

You can start mixed feeding from birth if needed. If there are no medical issues, it's generally helpful to wait until breastfeeding feels more established.

"It's generally best to wait until breastfeeding is well-established, typically around four to six weeks," says Dr Krishnan. "Remember, breastfeeding is about so much more than just milk – it's also about the connection, the skin-to-skin contact, and the oxytocin that helps support maternal mental health."

How to introduce mixed feeding.

The key is to make bottle feeding feel similar to breastfeeding for your little one. Breastfed babies are used to controlling milk flow, so they might take more from a bottle than they actually need.

"If you choose to introduce formula, I recommend doing so gently, offering bottles in the same way as breastfeeds," says Dr Krishnan. "Using the paced bottle-feeding method can help your baby process the milk more comfortably."

For paced feeding:

• Watch for hunger cues rather than following a strict schedule
• Hold your bub upright during feeding
• Use a slow-flow teat with a narrow bottle
• Let your little one take the teat rather than pushing it in
• Allow rest breaks during feeding
• Let your bub decide when they're finished

Safety essentials: Sterilize bottles between feeds and prepare formula exactly as instructed. Stay well away from adding breastmilk to powdered formula instead of water.

What to expect with mixed feeding.

Mixed feeding works beautifully for many families, and like any feeding journey, there are some things worth knowing:

• Your milk supply may adjust - your body responds to how much milk is needed, so supply might decrease if you're replacing feeds regularly
• Your bub might develop preferences - some babies find bottles easier and may show a preference (though many happily switch between both)
• A bit more logistics - formula involves some extra prep, sterilizing, and costs, but many families find their groove quickly
• Listen to your body - if you notice breast discomfort, gentle massage and regular milk removal can help prevent issues.

Transitioning back to exclusive breastfeeding

If you want to move back to exclusive breastfeeding, it's absolutely possible with patience and a few insider tips:

• Increase breastfeeding frequency - offer the breast more often, even for short feeds
• Use both breasts - gives your body the message to make more milk
• Create a calm environment - where you and bub can relax together
• Gradually reduce formula - slowly decrease formula feeds
• Be patient - this transition takes time, and every step forward counts
• Get support - your lactation consultant or child health nurse can provide personalized guidance

Your body is amazingly responsive - with consistent feeding, most parents see improvements within days to weeks.

Getting support

Before starting mixed feeding, chat with your GP, child health nurse, or lactation consultant for advice. You can also contact the Australian Breastfeeding Association for ongoing support.

The Final Word

There's no one "right" way to feed your baby - only what works best for your family. Whether mixed feeding is a choice, a necessity, or somewhere in between, you're providing love and nourishment in the way that suits your circumstances. Trust yourself and don't hesitate to seek support when you need it.

Lactation consultant Dr Kavita Krishnan is an independent medical professional and was not paid for her commentary.