Some of the hardest feeding cases to catch are the ones where the baby is succeeding. They're gaining weight. They're latching. And they're working much harder than they should be to do it.
That extra work is compensation. Babies are remarkably good at it, and that's exactly why it's easy to miss.
Cues are the baby's language
Before we can spot compensation, we have to read the baby's cues well.
Engagement cues tell us the baby is ready: rooting, hands to mouth, soft alert eyes, a relaxed but flexed body.
Stress cues tell us the baby is reaching their limit: finger splaying, arching, gaze aversion, hiccups, sneezing, color change, or a sudden shutdown into sleep.
Satiety cues tell us the baby is done: open hands, softened body, slowing suck, and coming off the breast on their own.
The pattern matters more than any single cue. A baby who shows stress cues early in every feed is telling us something about how hard feeding is for them.
What compensation looks like
When a baby can't use the ideal movement pattern, they find another way. Common compensations include:
Jaw clenching or biting to stabilize the nipple when the tongue can't
Lip curling or blistering as the lips do work the tongue usually does
A shallow, pursed latch when the baby can't open wide comfortably
Clicking or popping off to manage a flow that's too fast
Neck hyperextension to open the airway or create more space for the jaw
Short, frequent feeds when endurance runs out before the baby is full
Each of these lets the baby get milk in the short term. Over time, they can lead to nipple pain, low supply, fatigue, reflux-like symptoms, and a baby who seems unsettled even after feeding.
Why it gets missed
Compensation is often invisible on a weight check. The baby is growing, so the family is told things are fine. But the parent is in pain, the feeds take 50 minutes, and nobody is sleeping.
"Normal" weight gain doesn't always mean functional feeding. A baby can be meeting their numbers while running on a pattern that isn't sustainable.
Asking better questions
When something feels off, ask:
What is this baby doing to make the feed work?
What would happen if we took that compensation away?
Where is the compensation coming from? The mouth, the neck, the trunk, the flow, the baby's state?
The goal isn't to remove compensations right away. They exist for a reason. The goal is to find what they're compensating for, and address that.
This is a core idea in Functional Lactation: the behavior we see at the breast is usually a solution to a problem somewhere else.
Dr. Emily Spaeth, PT, DPT, IBCLC, is the founder of Be Well Baby® in Portland, Oregon, and teaches in Pacific University's Doctor of Physical Therapy program. If you're a PT, OT, or IBCLC who wants to work this way, join the waitlist for the Functional Lactation Intensive.
