Low Milk Supply, Combo Feeding, and Why Feeding Your Baby Is Not a Pass/Fail Test

Breastfeeding is often talked about like it should be natural, easy, and instinctive.

And sometimes, it is.

But for many moms, breastfeeding is hard. Not because they are doing something wrong. Not because they didn’t try hard enough. Not because they failed.

Sometimes, milk supply is complicated.

Sometimes, your baby has a beautiful latch, you are doing “all the right things,” and your body still needs extra support. Sometimes, formula becomes part of the story. Sometimes, combo feeding is not the backup plan. It is the plan that helps your baby thrive and protects your mental health.

This is especially true for moms dealing with low supply.

True Low Supply vs. Perceived Low Supply

One of the first things to understand is that there is a difference between true low milk supply and perceived low supply.

Perceived low supply is when a mom feels like she does not have enough milk, but baby is actually transferring well, gaining weight appropriately, and having enough wet and dirty diapers.

True low supply means mom’s body is not producing enough milk to meet baby’s daily volume needs.

As babies grow, their intake needs increase. For many babies, once they are around 11–12 pounds, they typically need at least about 24 ounces of milk in a 24-hour period. If mom’s body is not producing that amount, or baby is not effectively transferring that amount, low supply may be part of the picture.

The only way to really know what is happening is to work with a lactation consultant who can evaluate the full feeding picture, including latch, transfer, weight gain, diaper output, pumping output, and maternal risk factors.

Why the First 24 Hours Matter

The first 24 hours after birth matter so much for long-term milk supply.

Even if breastfeeding appears to be going beautifully, hand expression in the first hour after birth and after feeds during the first 24 hours can help stimulate milk production and support supply later.

That does not mean every mom needs to pump aggressively from day one. But it does mean we should be thinking ahead.

Some moms have no major risk factors for low supply. Their baby latches well, they have plenty of colostrum, and milk removal is going smoothly. For those moms, unnecessary pumping may contribute to oversupply.

But for moms with risk factors, early and intentional milk removal can be incredibly important.

Common Risk Factors for Low Milk Supply

Low supply can be caused by many things, and often, it is not just one factor. It can be multifactorial.

Some common risk factors include:

• History of breast surgery

• PCOS

• Thyroid dysfunction

• Delayed milk coming in

• Long or difficult labor

• Significant stress

• Sleep deprivation

• Poor latch or painful latch

• Infrequent milk removal

• Baby not transferring milk well

• Oral restrictions

• Maternal anatomy

• Iron deficiency or anemia

One area that is often missed is iron status.

A mom may be told her labs are “normal,” but normal does not always mean optimal. When we are thinking about postpartum healing, lactation, energy, and milk production, we want to look beyond the bare minimum.

For example, ferritin can give us a better picture of iron stores. If ferritin is very low, oxygen delivery to tissues—including breast tissue—may not be optimal. That can matter when we are trying to understand why milk supply is not responding the way we hoped.

Hospital Lactation Support vs. Outpatient Lactation Support

Hospital lactation consultants can be helpful, especially in the first 24–48 hours.

But feeding a baby in the hospital is different from feeding a baby at two weeks, six weeks, or four months.

In the hospital, your milk may not be fully in yet. Your baby is brand new. Everyone is focused on those first few feeds.

Outpatient lactation care looks at the bigger picture: supply development, milk transfer, weighted feeds, pumping, supplementation, bottle feeding, sleep, maternal labs, and long-term feeding goals.

This is why ongoing support matters.

One consult can be helpful, but feeding plans often need to change as your baby grows. What makes sense at five days postpartum may not make sense at five weeks postpartum.

Triple Feeding Is Not a Long-Term Plan

Triple feeding means breastfeeding, then giving a bottle, then pumping.

Sometimes, triple feeding is used temporarily to protect supply while making sure baby gets enough milk.

But triple feeding is exhausting.

It is not meant to be a long-term lifestyle. For many moms, especially when they are doing it around the clock, it can become physically and emotionally unsustainable.

If triple feeding is part of your plan, there should also be a plan for when and how to reassess. You should know:

• Why you are doing it

• How long you are doing it

• What signs you are watching for

• When to follow up

• What the next step is if supply does or does not increase

You should not be left doing the same exhausting plan for weeks without guidance.

Combo Feeding Can Be a Healthy Feeding Plan

Combo feeding means baby receives both breast milk and formula.

For some families, combo feeding is temporary. For others, it becomes the long-term plan.

And that is okay.

Combo feeding can allow a mom to continue offering breast milk while also making sure her baby is full, growing, settled, and thriving.

For some moms, combo feeding protects the breastfeeding relationship because it takes the pressure off. For others, it protects mental health. For many families, it simply becomes the most realistic and loving option.

Formula is not failure.

A bottle is not failure.

Needing help is not failure.

Feeding your baby is not a pass/fail test.

Your Baby’s Needs Matter Too

Sometimes, a mom desperately wants breastfeeding to work a certain way. That desire is real, and it deserves compassion.

But as babies get older, feeding has to fit into the bigger picture of their development.

If a feeding session is taking 60–90 minutes every time, and baby is still not getting enough, that can affect wake windows, sleep, development, and everyone’s stress level.

At some point, the question becomes:

Is this feeding plan helping both mom and baby thrive?

That answer may change over time.

You may breastfeed more in the early weeks and less later. You may pump for a season and then stop. You may offer one bottle of breast milk a day. You may combo feed. You may switch fully to formula.

The goal is not to force one version of feeding.

The goal is to make sure your baby is fed, your body is supported, and your mental health matters too.

If You Are Pregnant, Here’s What You Can Do Now

If you are pregnant and hoping to breastfeed, it is worth thinking about support before your baby arrives.

Consider:

• Taking a prenatal breastfeeding class

• Booking a prenatal lactation consult

• Learning hand expression before delivery

• Asking about your personal risk factors

• Making a plan for the first 24 hours

• Knowing who you will call after discharge

• Scheduling early postpartum lactation support

Especially if you have a history of breast surgery, PCOS, thyroid issues, low iron, infertility, diabetes, or previous low supply, it is helpful to have a proactive plan.

If You Are Struggling Right Now

If feeding feels hard right now, you are not alone.

If your supply is low, you are not broken.

If you need formula, you are not failing.

If you are grieving the feeding experience you hoped for, that grief is real.

But you deserve support, not shame. You deserve a plan that considers your baby, your body, your labs, your mental health, and your real life.

At Baby Settler, we help families navigate breastfeeding, pumping, bottle feeding, combo feeding, low supply, and postpartum wellness with practical, compassionate support.

Because the goal is not perfection.

The goal is a fed, growing baby—and a mom who feels supported along the way.

About the Author

I’m Hillary Sadler, RN, IBCLC — board-certified lactation consultant and master’s-level registered nurse; author of Babies Made Simple; mom of four; and founder of Baby Settler Consults, located in Charleston, SC (and supporting families virtually worldwide).

Disclaimer: This content is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider regarding any questions or concerns about your or your baby’s health.

In your corner, always.
—Hillary