Is Your Baby Drinking Less Formula Than Usual?

Every baby is different, so know that formula feeding times and amounts will vary. In the first days of life, newborns typically drink small amounts, about 1 to 2 ounces every 2 to 3 hours. This will total to around 8 to 12 feedings per day.

As babies grow, their stomach capacity increases, allowing them to drink more at each feeding and go longer between feeds. In the following weeks and months, expect to feed every 3 to 4 hours. Feeding sessions can vary in length, and babies generally self-regulate by stopping when full.

Between 6 and 12 months, babies typically eat 5 to 6 times per day, combining formula and solid foods, and by 12 months, they can gradually transition from formula to whole cow’s milk or fortified soy alternatives.¹

There are several reasons your baby may be drinking less formula than usual, and most of them aren’t cause for concern. In the first year of life, babies go through different phases of growth and development, and their feeding habits can change based on this. Here are some of the common causes of babies drinking less formula:

1. Growth Spurts and Appetite Changes

Babies don’t eat the exact same amount every day. While growth spurts can temporarily increase hunger, it’s also normal for appetite to decrease afterward or during periods of slower growth. A baby may drink less formula simply because their body needs less at that moment. What matters most is the overall trends of steady weight gain and continued development.

2. Teething Discomfort

Teething can make feeding uncomfortable. Sore gums may cause babies to fuss during feeds or drink less than usual, even if they are hungry.

3. Illness

Illnesses like colds, ear infections, or congestion can reduce appetite. Babies may drink less formula if feeding feels uncomfortable; for example, due to pressure in the ears or difficulty breathing through the nose. Intake usually returns to normal once they feel better, but persistent refusal or signs like dehydration or lethargy should be evaluated by a pediatrician.

4. Tiredness or Irritation

When your baby is tired, they will want to sleep and not eat. If your baby feels overheated, they may also feel uncomfortable and be unable to focus on feeding.

5. Introduction to Solid Foods

When your baby starts to eat their first solid foods, they will naturally start to drink less formula. While formula should still be their primary source of nutrients in the first year, the amount they consume each feeding will start to decrease the more solid foods they eat.

6. Distractions or Changes in Routine

If your baby is distracted during feedings, they may drink less formula. Changes in routine, such as moving to a new environment, traveling, or changes in the household, and loud noises can affect your baby’s feeding habits. This is especially common around 4–6 months and beyond as babies become more aware of their surroundings.²

If you’ve noticed a decrease in your baby’s formula intake, there are several things you can do to ensure they’re getting the nutrition they need.

1. Observe and Track Feeding Patterns

Start by observing your baby’s feeding patterns and tracking the amount of formula they’re drinking. If the decrease is small and short-term, there’s probably no need to worry. However, if the reduction continues over several days or if your baby shows signs of dehydration (fewer wet diapers, dry mouth, etc.), it’s important to consult your pediatrician.

Keep an eye on your baby’s overall growth and development. If they’re still meeting developmental milestones and their weight is steady, a temporary decrease in formula intake is likely not a concern.

2. Offer Smaller, More Frequent Feedings

If your baby is drinking less at each feeding, try offering smaller amounts of formula more frequently throughout the day. This can be helpful if they’re teething or not feeling their best.

3. Ensure Comfortable Feeding Conditions

Make sure your baby is comfortable and relaxed during feeding time. If they’re fussing or distracted, try to minimize noise and stimulation to help them focus on drinking enough milk. Hold them in a calm, supportive position and make the feeding environment as soothing as possible. If they are teething, using gentle gum relief methods, like a cool teething ring, may help. If they are distracted by their environment around them, offering a single focal point, like a stuffed animal, can help them concentrate on feeding.

4. Continue Offering Formula with Solids

If your baby has started eating solids, continue offering formula along with solid foods. Formula should still be their main source of nutrition for the first year, and solid foods should complement their milk intake to ensure they are getting enough. Be patient as your baby adjusts to this new feeding routine.

"When she was around 3 months old, my daughter suddenly started drinking much less formula, becoming fussy at every meal while also falling off her consistent weight gain, and it completely blindsided me. I went from having a great eater to feeling a massive amount of anxiety and failure as she started to refuse more and more meals every day. 

I eventually realized she wasn't rejecting the bottle or the formula itself, she was just becoming a distracted eater who needed a consistent focal point to stay on task. I couldn't find a solution that helped, so I created one myself: silicone sensory toys that attach directly to the bottle. Giving her that sensory engagement turned our feedings from a daily struggle back into a calm, bonding moment, which was a huge relief for my own mental health."

-Jennie Albano, Mother and Founder of Feeding Friendzies

Seeing your baby drink less formula can be concerning, but it’s often just a temporary phase. Whether it’s due to teething, illness, or the introduction of solids, babies’ feeding patterns can change over time. By observing your baby’s behavior and making small adjustments, you can help ensure they’re still getting the nutrition they need. And always remember, if you’re unsure, it’s always a good idea to reach out to your pediatrician for guidance.