Feeding is never just about nutrition. For an infant, feeding is a full-body, full-brain experience involving reflexes, motor coordination, sensory input, and emotional connection. As lactation professionals, we support families through these transitions—decoding behaviors, identifying red flags, and knowing when to refer.

Let’s take a developmental tour of the first two years of life, examining feeding behaviors, reflexes, and what’s normal and what’s not.

Newborn Period (0–2 Months): Reflexes Rule

In the early weeks of life, feeding is almost entirely reflex-driven. Rooting, sucking, and swallowing reflexes are present at birth and help the baby survive. The tongue thrust reflex—also present—is a protective mechanism that causes the tongue to push outward when the lips are touched (Johnson & Blasco, 1997). These reflexes guide how babies latch and feed in the early days.

What’s Not Normal:

• Weak or absent suck

• Poor or inconsistent latch

• Shallow rooting or no rooting response

• Gagging or coughing during feeds

• Excessive sleepiness beyond the first 5–7 days

• Consistently long or ineffective feeds

Why It Happens:

Abnormal feeding behaviors in the newborn period often reflect underlying disruptions in reflexive feeding patterns. A weak or absent suck may result from prematurity, hypotonia, or neuromuscular conditions. Disorganized suck-swallow-breathe coordination can be caused by birth trauma, perinatal hypoxia, or central nervous system immaturity (Johnson & Blasco, 1997). Oral structural issues such as ankyloglossia (tongue-tie), cleft palate, or retrognathia may interfere with latch and transfer. Excessive sleepiness at the breast could stem from unresolved jaundice, hypoglycemia, or even maternal medications transferred via breastmilk. Additionally, neonates exposed to maternal conditions (e.g., gestational diabetes, intrauterine growth restriction) may require additional monitoring and support.

What to Do:

• Assess latch, tone, and alertness during feeds.

• Consider a weighted feed and observe suck-swallow-breathe rhythm.

• Refer to a pediatrician for neurological or congenital concerns.

• Refer to an occupational or speech-language pathologist for feeding therapy.

Early Infancy (2–6 Months): Growing Coordination

As reflexes begin to integrate, feeding becomes more purposeful. The rooting reflex fades around 4 months; the tongue thrust begins to diminish between 4–6 months, making way for new oral motor skills (Johnson & Blasco, 1997). Breastfeeding often becomes more efficient, and sessions may become shorter.

What’s Not Normal:

• Breast refusal after previously feeding well

• Difficulty sustaining latch

• Excessive gassiness or spitting up that disrupts feeding

• Prolonged feeding sessions (>45 minutes)

• Poor weight gain despite frequent feeding

Why It Happens:

By this stage, feeding should become more organized and efficient, so persistent issues may reflect deeper concerns. A sudden change in feeding behavior—such as new-onset breast refusal—could be related to a fast letdown, oversupply, illness, teething, or even emotional shifts in the home (Johnson & Blasco, 1997). If the baby appears uncomfortable during or after feeds, gastroesophageal reflux or cow’s milk protein allergy may be contributing. Poor weight gain may indicate ineffective milk transfer, maternal low milk supply, or increased energy demands due to underlying health conditions. A distracted or fussy baby may simply be responding to their rapidly expanding awareness of the world, but persistent difficulty feeding should prompt further assessment.

What to Do:

• Reassess positioning and milk flow.

• Consider oversupply or fast letdown.

• Recommend feeding in a low-distraction environment.

• Refer to a pediatrician for concerns like reflux or allergy.

• Refer to a feeding therapist if signs of oral dysregulation persist.

Late Infancy (6–12 Months): From Reflexes to Exploration

By six months, babies typically have integrated their primitive reflexes and are ready for complementary feeding—showing signs like sitting independently, diminishing tongue thrust, and interest in food (Paris et al., 2019). Feeding is now about exploration, skill-building, and sensory learning.

What’s Not Normal:

• Persistent gagging or vomiting with solids

• Aversion to texture or strong refusal of spoon feeding

• Inability to manage soft solids by 9 months

• Ongoing dependence on milk or purees with refusal of finger foods

• No self-feeding attempts by 9–10 months

Why It Happens:

Feeding issues in this stage often involve the transition from exclusive milk feeding to solid foods. Babies who gag excessively or vomit when offered solids may have delayed oral-motor skills, sensitive gag reflexes, or negative feeding associations from prior choking or force-feeding events (Mennella et al., 2020). Strong aversions to certain textures may reflect sensory processing differences, while avoidance of self-feeding may be tied to delayed fine motor development or anxiety. Additionally, infants who have experienced prolonged medical interventions (e.g., NICU stays, nasogastric feeding) may develop oral aversion. A limited food repertoire or persistent puree dependence beyond 9 months can also reflect a lack of exposure due to caregiver fear or misinformation.

What to Do:

• Encourage positive, pressure-free food exposure.

• Introduce new textures gradually, avoiding overreliance on pouches or thin purees.

• Refer to a pediatrician or registered dietitian for nutritional assessment.

• Refer to an occupational therapist or speech-language pathologist specializing in feeding therapy for oral-motor or sensory concerns.

Toddlerhood (12–24 Months): Autonomy and Appetite Shifts

By one year, toddlers are typically eating three meals and snacks alongside the family. They self-feed, use open cups, and explore a wide range of textures. Appetite may fluctuate due to slowing growth and emerging autonomy.

What’s Not Normal:

• Refusing most or all solids

• Reliance on milk for nutrition (e.g., >24 oz/day)

• Difficulty chewing or moving food side-to-side in the mouth

• Severe food selectivity or anxiety around eating

• Feeding struggles that cause distress or interfere with growth

Why It Happens:

Feeding challenges in toddlers often stem from a combination of behavioral, sensory, and physiological factors. At this age, toddlers naturally assert autonomy, which can show up as selective eating or food refusal (Paris et al., 2019). However, when refusal is extreme or persistent, it may indicate unresolved oral-motor delays, heightened sensory sensitivities, or gastrointestinal discomfort (e.g., constipation, reflux, food allergies). Continued overreliance on milk or bottle feeding may suppress appetite for solids and interfere with chewing skill development. Some feeding challenges also reflect family dynamics—parents who are anxious, controlling, or overly permissive at mealtimes may inadvertently escalate battles or reinforce food refusal. Additionally, adverse early feeding experiences (e.g., choking, force feeding, frequent illness) can lead to conditioned aversions and anxiety around eating.

What to Do:

• Reassure families about fluctuating toddler appetite and typical “picky” phases.

• Guide responsive feeding practices: allow self-feeding, avoid pressure.

• Refer to pediatrician for growth concerns or possible medical contributors.

• Refer to a multidisciplinary feeding team (e.g., OT, SLP, RD) for severe food refusal or feeding aversion.

Conclusion: Trust Development—and Your Instincts

Feeding in the first two years of life is a rapidly evolving process shaped by reflexes, motor development, sensory input, caregiver interaction, and emotional regulation. From the reflexive feeding patterns of a sleepy newborn to the opinionated preferences of a toddler, feeding is always about more than just nutrition—it’s a reflection of a child’s overall development and well-being.

As lactation professionals, we are uniquely positioned to observe feeding behaviors early and guide families through normal variations. But we’re also trained to notice when something isn’t quite right. A baby who can’t coordinate suck-swallow-breathe, a six-month-old who gags at every spoonful, or a toddler who refuses all solids—these aren’t just quirky preferences. They may be signs of oral-motor delay, sensory aversion, structural barriers, or underlying health issues.

While we can educate and support parents through common developmental transitions, we must also feel confident in knowing when a feeding behavior is beyond our scope.

When in doubt—refer.

Build a referral network that includes pediatricians, occupational and speech-language pathologists with pediatric feeding expertise, dietitians, mental health professionals, and pediatric dentists or ENTs. Collaborating with these professionals ensures that infants and toddlers get the comprehensive, family-centered care they need to thrive.

Supporting feeding is about meeting families where they are, understanding what’s typical at each stage, recognizing red flags early, and ensuring every baby has the opportunity to feed with comfort, connection, and confidence.

References

Johnson, C. P., & Blasco, P. A. (1997). Infant growth and development. Pediatrics in Review, 18(7), 224–235. https://doi.org/10.1542/pir.18-7-224

Mennella, J. A., Forestell, C. A., Ventura, A. K., & Fisher, J. O. (2020). The development of infant feeding. In Nutrition and Human Development (pp. 263–279). Cambridge University Press. https://doi.org/10.1017/9781108351959.010

Paris, J., Ricardo, A., & Rymond, D. (2019). Child growth and development. College of the Canyons. https://www2.palomar.edu/pages/childdevelopment/chdv-100-online-textbook/