Combination Feeding: Breast and Bottle Together

Combination feeding — using both the breast and the bottle — is extremely common. In most countries, the majority of babies who start at the breast end up combination fed at some point before they are fully weaned. Families move between patterns for all kinds of reasons: work, sleep, shared caregiving, milk supply, medical needs, or simply what feels right.

There is no single correct ratio. The most useful framing is practical: what rhythm lets you feed the baby reliably and keeps the household sane?

What Combination Feeding Can Look Like

Some common patterns:

• One bottle at bedtime, breastfeeding during the day
• Daycare bottles, nursing before and after work
• Top-ups after nursing, for babies whose supply isn't quite meeting demand
• Night bottles given by a partner, nursing during the day
• Mostly breastfeeding with occasional formula bottles, so any caregiver can step in
• Mostly formula with a morning or bedtime nursing session, for comfort and connection

Any of these is a legitimate way to feed a baby.

Protecting Milk Supply

Supply responds to demand. The key principle:

> If a nursing session is replaced by a bottle, the breast still needs the demand signal.

In practice that usually means:

• Pumping at the same time the baby would have nursed, even a short session
• Storing the expressed milk for future bottles
• Continuing to nurse outside of the bottle-replaced feeds

If bottles are added without any pumping to replace the skipped feeds, supply will typically adjust downward over 1–2 weeks at that time of day. That is fine if it's intentional. It's frustrating if it's not what you planned — and is the most common reason supply drops unexpectedly after introducing bottles.

Avoiding Bottle Preference

Babies can start to prefer the bottle if bottles feel easier than the breast. The two big levers:

• Flow. Slow-flow nipples, and only slow-flow nipples, at every age.
• Pace. Paced, responsive bottle feeding keeps the effort closer to nursing.

See our paced bottle feeding guide for a full walk-through.

Other small things that help:

• Holding the baby close in a nursing-like position
• Switching sides halfway through the bottle
• Skin-to-skin time around feeds
• Keeping eye contact during the bottle, the way you would at the breast

Moving From Full Nursing to Combination Feeding

If you're transitioning on a timeline — work, a trip, another reason — a gradual swap is almost always easier than a sudden change.

A typical gentle schedule:

1. Choose the first feed to replace. Mid-afternoon is often the easiest — supply is typically a bit lower and feeds are often shorter.
2. Offer a bottle instead. Pump at that time if you want to keep supply.
3. Wait 3–5 days before replacing another feed. This gives your breasts and the baby time to adjust.
4. Continue swapping one feed at a time until you reach the rhythm you want.
5. Keep bedtime and first-morning feeds until last if you want to hold on to the most established comfort sessions.

Breastfeeding tends to stay reliable in the morning and at bedtime even as daytime feeds move to bottles, because those sessions are typically the best-established and the most hormonally supported.

Choosing What Goes in the Bottle

• Expressed breast milk — nutritionally identical to nursing, ideal when supply allows.
• Formula — provides full nutrition. Follow the preparation guidance exactly (see our formula preparation guide).
• A mix of expressed milk and formula — fine. Some families use expressed milk in daycare bottles and formula at bedtime, or vice versa.

If you're introducing formula for the first time, start with small amounts alongside breast milk so the baby gets used to the taste gradually.

When Combination Feeding is a Relief

It's worth naming this part: a lot of families discover that shared bottle feeding is the piece that makes feeding sustainable. A partner who can take a night feed, a caregiver who can step in on a bad day, a reliable way to feed the baby when supply wobbles — these are real benefits, not compromises.

Feeling guilty about introducing bottles is extremely common, and extremely unnecessary. Fed is fed. What matters is that the baby is growing, and that the adults in the house are not running on empty.

When to Ask for Help

Talk to a midwife, health visitor, IBCLC, or paediatrician if:

• Supply drops more than you intended and you want to rebuild it
• The baby starts refusing the breast after bottles are introduced
• You're unsure whether the baby is getting enough milk overall
• The transition is causing physical discomfort (engorgement, blocked ducts)

These are all common situations with good practical fixes.

Log Both Sides of the Rhythm

Combination feeding adds up to a lot of moving parts — nursing sessions, pumping sessions, bottles of expressed milk, bottles of formula, who fed last, how much. Flaske gives you a single calm view of the bottle side, and pairs well with Amme for the nursing side.

With Flaske, you can:

• Log bottles of expressed milk and formula
• See daily intake across caregivers
• Share a synced view with your partner through private iCloud sync
• Spot the rhythm over the week

Flaske uses private iCloud sync so your feeding records stay inside your own iCloud account, visible only to the caregivers you invite.

Learn more about Flaske

References and Further Reading

• NHS: Combining breast and bottle — UK guidance on mixed feeding
• La Leche League: Bottle feeding a breastfed baby — Nursing-friendly bottle technique
• Ammehjelpen: Delvis amming — Norwegian guidance on combining breast and bottle

This content is for informational purposes only and does not replace professional medical advice. Consult your healthcare provider for personalised guidance.