Last updated: September 2026
How long can a baby go without eating? It depends on age: a newborn should not go more than 3 to 4 hours between feeds, a 1 to 3 month old can often stretch to 4 or 5 hours at night, and a healthy baby past 4 to 6 months may sleep 6 to 8 hours once weight gain is on track. One skipped feed is usually fine. A baby under 3 months who refuses two feeds in a row, or any baby with fewer wet diapers, unusual sleepiness, or a fever, needs a call the same day.
Key takeaways
- Newborns eat 8 to 12 times in 24 hours. Wake a newborn who has gone 4 hours without a feed until they are back to birth weight.
- A long gap is safe when your baby is gaining weight, has 6 or more wet diapers a day (after day 5), and is alert when awake.
- Most refusals have a simple cause: a stuffy nose, teething, an ear infection, reflux, or a nursing strike. Offer smaller feeds more often, and do not force it.
- When a baby is sick, fluids matter more than calories for a day or two. Call the same day for a baby under 3 months who refuses two feeds in a row or has a fever of 100.4°F or higher.
How long can a baby go without eating at each age?
Premature babies, babies with jaundice, and babies who lost more than expected after birth need tighter limits, so follow the plan from your first newborn visit.
Birth to 2 weeks. Breastfed newborns usually nurse every 2 hours, and bottle-fed newborns eat every 2 to 3 hours with a minimum of about 8 feeds. [Source: AAP HealthyChildren.org, How Often and How Much Should Your Baby Eat?] The AAP advises waking a newborn who sleeps longer than 4 to 5 hours in the early weeks. [Source: AAP HealthyChildren.org, Amount and Schedule of Formula Feedings] Our rule: no more than 3 to 4 hours from the start of one feed to the start of the next until your baby is back to birth weight.
2 weeks to 3 months. By about one month, most babies feed every 3 to 4 hours. The CDC notes that breastfed babies still feed 8 to 12 times a day, and some cluster feed hourly and then sleep 4 to 5 hours. [Source: CDC, How Much and How Often to Breastfeed] One 4 to 5 hour night stretch is fine once weight gain is steady. More in our post on how often a newborn should eat.
4 to 6 months. The AAP notes that between 2 and 4 months many formula-fed babies no longer need a middle-of-the-night feed. A 6 to 8 hour night stretch is normal here if daytime feeds and weight checks stay on track.
6 to 12 months. Once solids start, most babies take 4 or 5 milk feeds a day plus meals, and longer nights become the norm.
How do I know a long gap is fine and not a problem?
Three checks tell you almost everything.
Weight. Newborns should not lose more than 8 to 10 percent of birth weight before they start gaining, and most are back to birth weight by two weeks. [Source: AAP HealthyChildren.org, How to Tell if Baby is Getting Enough Milk]
Wet diapers. By day 5 to 7, expect 6 or more a day with pale yellow urine. See our guides on how many wet diapers a newborn should have and wet diapers for a 1 year old.
Behavior. A well-fed baby is alert when awake and content for 1 to 3 hours after a feed.
Warning signs: too sleepy to finish feeds, spreading jaundice, fewer wet diapers, dark urine, or weight loss beyond 10 percent. Any one means a call today.
Why is my baby suddenly refusing to eat?
A baby who ate well yesterday and refuses today almost always has a reason:
- Stuffy nose. A congested baby cannot breathe and swallow at once, so they latch, pull off, and cry.
- Ear infection. Pulling off screaming after a recent cold is classic; see our guide to ear infections in children.
- Teething. Sore gums make sucking hurt, usually with drooling and gnawing.
- Oral thrush. White patches in the mouth that do not wipe off, so feeding hurts.
- Reflux. Arching, crying mid-feed, frequent spit-up.
- Nursing strike. A breastfed baby, often 3 to 9 months old, abruptly refuses the breast for 2 to 5 days, often after a new soap, a loud reaction to a bite, or a supply dip.
- Bottle flow. Too fast causes choking; too slow makes the baby tire and quit.
- Overtired or distracted. A missed nap, or the 4 to 6 month habit of pulling off whenever someone walks by.
What should I try in the next few hours?
- Clear the nose first. Saline drops, then suction, before every feed while a cold lasts.
- Change the setting and position. A quiet, dim room with no siblings; more upright for reflux or ear pain.
- Cool the gums. A chilled (not frozen) teether for a few minutes, then offer the feed.
- Pace the bottle. Hold it more horizontal, let your baby pause every few sucks, and try a slower nipple.
- Offer more often, not more volume. An ounce or two every hour goes down easier than a full bottle every 3 hours.
- Do not force it. Stop, soothe, and try again in 20 to 30 minutes. For a nursing strike, offer when your baby is drowsy and keep pumping.
What if my baby is sick and will not eat?
For a day or two of illness, fluids matter more than calories. A baby with a cold or a stomach bug can eat less than usual without harm as long as they stay hydrated.
The wet diaper rule. A sick baby should still produce at least 6 wet diapers in 24 hours. The AAP lists fewer wet diapers, a dry mouth, fewer tears, and a sunken soft spot as early signs of dehydration, and urinating only once or twice a day as a sign of severe dehydration. [Source: AAP HealthyChildren.org, Signs of Dehydration in Infants and Children] See our guide to signs of dehydration in babies.
Oral rehydration solution only if advised. For vomiting or diarrhea, the AAP recommends breast milk, formula, or an electrolyte solution given according to your pediatrician’s directions. [Source: AAP HealthyChildren.org, Treating Dehydration with Electrolyte Solution] Never give plain water or juice to a young infant.
Fever changes the math. A temperature of 100.4°F (38°C) or higher in a baby under 3 months needs a call right away, day or night, and at any age fever with unusual sleepiness, repeated vomiting, or trouble breathing does too. [Source: AAP HealthyChildren.org, Fever: When to Call the Pediatrician] Our fever guide has the age-by-age breakdown, and in-office rapid testing can explain a sudden refusal within minutes.
When should I call, and when is it an ER visit?
Call the same day if your baby:
- Is under 3 months and refuses 2 feeds in a row or goes 8 hours without eating
- Is under 3 months with a temperature of 100.4°F or higher
- Has fewer than 6 wet diapers in 24 hours, or none in 6 to 8 hours
- Is vomiting repeatedly or hard to wake for feeds, or is over 3 months and refuses all feeds for 12 hours
Go to the ER or call 911 if your baby:
- Has blue, gray, or very pale lips or skin
- Is struggling to breathe or has pauses in breathing
- Cannot be woken, or has sunken eyes and urinated only once or twice in a day
If unsure, call. A secure video visit lets us see your baby’s color and breathing within minutes.
Feeding frequency and the gap that means call, by age
| Age | Normal feeds in 24 hours | Typical longest gap | Call the same day if |
|---|---|---|---|
| Birth to 2 weeks | 8 to 12 | 3 to 4 hours; wake to feed | Refuses 2 feeds in a row, more than 5 hours without a feed, or worsening jaundice |
| 2 weeks to 3 months | 6 to 12 | 4 to 5 hours at night | Refuses 2 feeds in a row or 8 hours without eating, fever, fewer than 6 wet diapers |
| 4 to 6 months | 5 to 8 | 6 to 8 hours at night | Refuses all feeds for 12 hours, fewer than 6 wet diapers, or vomiting |
| 6 to 12 months | 4 to 5 milk feeds plus solids | 8 to 12 hours at night | No milk or water for 12 hours, or refusing fluids for a day while sick |
What about a toddler who eats almost nothing for a day?
A healthy 1 to 3 year old can eat very little for a day or two during a cold or a battle of wills and be fine. Keep water and milk available, offer small portions, and do not turn the table into a fight. Watch for the signs of dehydration in toddlers (no urine in 8 hours, dry lips, no tears, low energy), and call if your toddler refuses all fluids, has fever with a sore throat or ear pain, or eats almost nothing for more than 2 to 3 days.
How Sun Pediatrics can help
A baby who will not eat is a call we want. Every physician is board certified, and our team cares for children from birth through 18. We hold same-day sick visits Monday through Friday, so a baby who refused two feeds this morning can be weighed, checked for an ear infection or thrush, and tested for flu or RSV before dinner.
Our offices are in Marietta, East Cobb, Alpharetta, and Cumming, open Monday through Thursday 8:00 to 4:45 and Friday 8:00 to 4:15. Request an appointment online or call 678-501-5601. Same-day sick visits are held Monday through Friday at all four offices.
Frequently asked questions
How long can a newborn go without eating at night?
In the first two weeks, no longer than about 4 hours. Once your baby is back to birth weight and gaining, your pediatrician may clear one longer stretch.
Should I wake my baby to feed?
Yes for a newborn who has gone 4 hours, has jaundice, or has not regained birth weight. After that, a baby gaining well with plenty of wet diapers can sleep.
Is it normal for a baby to skip a feed when teething?
Yes, one or two short or skipped feeds in a day are common. Offer a cold teether first, and call if it lasts more than a day or wet diapers drop.
Can I give my baby water or Pedialyte if they will not take milk?
Not under 6 months unless your pediatrician says so. For an older baby with vomiting or diarrhea, an electrolyte solution can help; call first for the amount.
This article is for general information and is not medical advice. Contact your pediatrician for care specific to your child.
