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  • Baby Not Eating as Much Formula as Usual? Here's Why!

    by Agustina Fernandez November 28, 2023 9 min read

    Baby Not Eating as Much Formula as Usual? Here's Why!

    As a parent, you're intimately familiar with your baby's day-to-day routines, especially when it comes to feeding habits. You've meticulously tracked their formula intake, memorized the times of day they usually get hungry, and perfected the art of finding just the right temperature for their bottles.

    But what happens when your little one suddenly deviates from this established routine, leaving you wondering what's up with baby not eating as much formula as usual? Before you start to worry, remember that changes in appetite are a natural part of their growth and development.

    That being said, while it's perfectly normal for your baby's feeding patterns to shift, it also helps to understand why these changes occur so you can navigate this phase with confidence and reassurance.

    In this article, we will delve into the various reasons why your baby may not be consuming as much formula as they typically do so that once you are finished reading, you'll be better equipped to understand and respond to your baby's changing appetite.

    Understanding Your Baby's Feeding Patterns

    Both breastfed babies and formula-fed babies will experience new eating habits over time as they grow and move on to new stages of development. A baby's eating habits are driven by a combination of developmental milestones, physiological changes, and emerging motor skills.

    Let's discuss some of the fine motor skills that are integral to the transition from a diet of your baby drinking milk exclusively to the introduction of complementary solids!


    transitioning to solid foods | Organic's Best 

    Sucking and Swallowing: Remarkably, coordination of sucking, breathing, and swallowing begins as early as 14 to 15 weeks gestation. Newborns, however, can initially only manage liquid feeding due to limited mouth space and restricted tongue movement. They adapt by adjusting their sucking response for different milk flows, whether from breast or bottle.

    The Gag Reflex: In newborns, the gag reflex serves to protect against swallowing large food pieces that could block the airway during early feeding.

    Tongue Control: At around two months of age, most babies start moving food to the back of their mouths. When beginning to introduce solid food at around six months, some tongue protrusion may be observed. Contrary to popular belief, not all babies with tongue protrusion dislike their food, but rather, it often represents a practice in tongue control.

    Opening Mouth in Response to Spoon: Typically, infants begin to open their mouths in response to a spoonful of food around four months of age, though this readiness varies among children.

    Factors that Influence a Baby's Appetite

    A multitude of factors influence a baby's appetite, including internal hunger and fullness signals, environmental cues, attitudes, and psychosocial factors related to food choices. Additionally, experiences in utero, influenced by a mother's nutritional intake during pregnancy, may impact a child's susceptibility to diseases like obesity.

    Interestingly, emerging research highlights the role of flavours experienced through amniotic fluid in shaping food preferences during infancy and childhood. Breastfeeding contributes significantly to appetite regulation, with human milk mirroring the mother's diet flavours and promoting food acceptance.

    Breastfeeding can also empower babies to self-regulate hunger, while bottle feeding can sometimes lead to overfeeding due to caregiver control. That being said, both bottle and breastfeeding are safe and healthy ways to nourish your little one!

    Growth Spurts and Feeding Slumps: The Ups and Downs of Baby's Appetite

    feeding slumps & growth spurts effects on appetite | Organic's Best 

    One of the remarkable aspects of a baby's early development is the rapid pace at which they grow. A baby's growth isn't always consistent; instead, it occurs in spurts. During a baby's growth spurts, their body works tirelessly to build new tissues and develop at an astonishing rate.

    What's fascinating is that these growth spurts can have a direct impact on your baby's appetite. You may notice that during these periods, your little one seems hungrier than usual and may consume more formula or human milk.

    Conversely, as your baby hits various developmental milestones, such as learning to sit up, crawl, or even walk, they may experience what can be described as "feeding slumps," where they may not eat as much food as usual. During these times, your baby's interest in feeding may decrease as they become more focused on their newfound abilities and explorations.

    Health Factors: When Illness Affects Appetite

    Illnesses can significantly affect a baby's formula intake, with one of the most common reasons being gastroenteritis. This condition often leads to a reduced appetite in children due to an upset stomach caused by increased intestinal peristalsis. Gastroenteritis is often accompanied by other symptoms such as vomiting, fever and diarrhea.

    In this case, it's essential to monitor your sick baby for signs of dehydration, which in infants can look like:

    • Dark yellow and strong-smelling urine

    • Sunken soft spot (fontanelle) on top of their head

    • Sunken eyes

    • Lack of tears when crying

    • Fewer wet diapers

    • Increased drowsiness or irritability

    If you notice dehydration symptoms, be sure to seek the help of a medical professional to address this issue.

    Teething Troubles: How Teething Can Impact Baby Formula Intake

    Teething is a significant milestone in your baby's development, but it can also bring about challenges in their feeding patterns. This happens because as those tiny teeth begin to push through the gums, many babies experience discomfort, soreness, and sometimes even pain.

    Sharing tips on managing feeding during teething periods

    Managing feeding during your baby's teething periods requires a bit of extra attention and TLC. Here are some helpful tips to make the process smoother: how to manage feeding during baby teething | Organic's Best

    1. Offer Chilled Teething Toys: Teething rings or toys that have been cooled in the refrigerator can provide relief for your baby's sore gums.

    2. Gentle Gum Massage: Using a clean finger, gently massage your baby's gums. This can help alleviate some of the discomfort and make them more receptive to feeding.

    3. Try Different Bottle Temperature: Some babies may prefer a slightly cooler or warmer formula during teething. Experiment with the temperature to see what your baby finds most soothing.

    4. Soft Foods: As your baby progresses to solids, consider introducing soft and cold foods like pureed fruits or yogurt.

    5. Maintain Regular Feeding Schedules: Stick to your baby's regular feeding schedule as closely as possible. Consistency can provide comfort and assurance during this potentially challenging time.

    6. Teething Gels: If your baby's discomfort is severe, consult with your healthcare provider about using teething gels or medications.

    7. Comfort and Cuddles: Sometimes, all your baby needs is a little extra love and cuddling. Offering comfort and security during feeds can make them feel more at ease.

    Transitioning to Solid Foods: The Impact on Formula Intake

    This exciting phase introduces new tastes, textures, and experiences to their palate. However, the introduction of solid foods can also lead to changes in their formula intake.

    It's not uncommon for babies to gradually reduce their reliance on infant formula as they become more accustomed to solid food. A baby's change towards consuming more solids is considered typical and is a positive sign of their development.

    Providing tips on balancing formula feeds and solids during this transition

    Balancing formula feeds and solids is a delicate dance that requires attention to both your baby's nutritional needs and evolving preferences. Here are some tips to help you navigate this exciting phase:

    1. Go Gradual: Begin by introducing small amounts of single-ingredient, pureed baby foods. Start with foods that are gentle on the stomach, like rice cereal or pureed fruits and vegetables.

    2. Maintain Formula Feeds: Continue to offer formula feeds as usual. At this stage, solid foods should complement, not replace, formula.

    3. Watch for Readiness Signs: Look for signs of readiness for solids, such as sitting up with support, showing interest in food, and having good head control.

    4. Offer a Variety: Introduce a variety of flavours and textures in baby foods to encourage taste exploration and appreciation for new food.

    5. Monitor Your Baby's Cues: Pay attention to your baby's cues. If they seem full or disinterested during a solid meal, don't force them to eat more. Likewise, if they're still hungry after solids, offer additional formula.

    6. Stay Patient: Understand that your baby's appetite for formula may fluctuate during this transition. On some days, they may consume more formula and less food, while on other days, they might prefer solids. 

    Practical Tips: How to Respond When Baby Eats Less Formula

    It's not uncommon for babies to have fluctuations in their formula intake. If you notice your baby eating less formula, consider these strategies:

    • Offer Smaller, More Frequent Feeds: Instead of larger, less frequent feeds between longer stretches, offer smaller amounts of formula more frequently throughout the day.

    • Maintain a Calm Environment: Create a peaceful and distraction-free feeding environment.

    • Experiment with Formula Temperature: Try feeding your baby formula at different temperatures to see if your baby has a preference.

    • Adjust Feeding Times: Paying attention to your baby's cues for hunger can help as they may be more receptive to feeding at different times of the day. 

    When is it Time To Consult a Pediatrician for Help?

    Sometimes, changes in formula intake may be a cause for concern, in which case it's important to seek medical attention. Here are signs that it's time to contact your baby's doctor: 

    When to see a doctor if Baby Not Eating as Much Formula | Organic's Best 

    • Significant Weight Loss: If your baby is consistently losing weight or not gaining weight as expected.

    • Persistent Refusal to Eat: If your baby isn't eating consistently or displays signs of distress during a feed.

    • Signs of Illness: If your baby displays signs of illness, such as a high fever, excessive fussiness, or other concerning symptoms. Additionally, your baby is experiencing frequent vomiting or diarrhea, which may lead to dehydration and decreased formula intake.

    • Concerns About Allergies or Digestive Issues: If you suspect your baby has allergies or digestive issues that may be affecting their formula intake. 

    FAQs: Addressing Common Concerns

    Here, we address some of the most common queries about babies consuming less formula than normal.

    Is it normal for babies to drink less formula some days?

    Yes, it's entirely normal for babies to have variations in their formula intake from day to day. Just like adults, babies can have days when they are less hungry or have different needs. As long as your baby is growing well, has regular wet diapers, and seems healthy and active, occasional fluctuations in formula intake are usually nothing to worry about. 

    Why does my formula-fed baby never seem full?

    Some babies have hearty appetites and may seem to be hungry often. It's important to ensure you're following the recommended feeding guidelines for your baby's age and weight. If your baby consistently appears unsatisfied after feedings, consult with your baby's pediatrician to rule out any underlying issues or discuss potential adjustments to their feeding routine.

    Why is my 4-month-old eating less than usual?

    Around 4-months of age, babies often go through growth spurts, teething, or developmental changes, which can temporarily affect their appetite. Usually, their appetite will return to normal as their growth spurt ends. Additionally, as you start introducing solid foods alongside their liquid diet, they may be less interested in formula.

    Does a baby get more full with baby food or formula?

    Babies typically get more full from formula or breast milk than from baby food during the early stages of introducing solids. Solid foods are meant to complement milk feeds and should not replace them until your baby is older and consuming a wider variety of solids. 

    When should I worry about my baby not eating?

    If your baby consistently refuses to eat, has difficulty swallowing, displays signs of distress during feeding, experiences significant weight loss, fails to gain weight as expected, or shows signs of illness, it's time to make a trip to the doctor's office.



    As a new parent, it's important to remember that fluctuations in your baby's formula intake are often a completely normal part of their development. Babies grow and change rapidly, and their feeding habits can evolve along the way.

    The key is to stay attentive, flexible, and responsive to your baby's needs and to contact your baby's doctor when you see any of the causes for concern discussed in this article. Best of luck on your feeding journey!



    Please be aware that this information is based on general trends in babies, and it is not medical advice. Your doctor should be your first source of information and advice when considering any changes to your child’s formula and when choosing your child’s formula. Always consult your pediatrician before making any decisions about your child’s diet or if you notice any changes in your child.

    Breastfeeding is the best nutrition for your baby because breast milk provides your child with all the essential nutrients they need for growth and development. Please consult your pediatrician if your child requires supplemental feeding.

    Agustina Fernandez
    Agustina Fernandez

    Dr. Agustina Fernandez earned her medical degree from the prestigious Universidad Nacional de Córdoba, Argentina. With a deep-rooted passion for pediatrics, Dr. Fernandez is currently on the path to specializing in children's healthcare. Recently, she has delved into the vital field of infant nutrition. Her research interests include breastfeeding, infant formula, and baby food in little ones’ formative years. Dr. Fernandez's commitment to this area of study underscores her dedication to ensuring the health and well-being of children from their earliest days.

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