Four numbers decide whether a hand-reared kitten thrives: a feed every 4 hours, milk warmed to 38 C, 5-10 mL per feed, and 30-60 seconds of stimulation to urinate and defecate after every one of those 6 daily feeds. A newborn weighs 90-120 g and cannot control its own body temperature for the first 14-21 days, so a cold kitten will not digest milk even when the interval and the volume are right. That is the failure home feeders miss most: a 35 C kitten fed 38 C milk on schedule still loses 10 g a day, and the powder gets blamed. A scale that reads to 1 g, a chart on the fridge door, and vet checks at 48 hours, 7 days and 14 days turn the job from guesswork into arithmetic; the hour-by-hour version is in the hand-rearing protocol.
Why 4 hours, and which feed gets skipped
A newborn stomach empties in 2-3 hours, so a 4-hour interval sits at the safe outer edge: 6 feeds in 24 hours, 42 feeds a week. Many vets tighten it to every 3 hours (8 feeds) for a kitten under 90 g at birth, or one that cries 40 minutes early, and stretch to 5 hours past 200 g. Nothing should go past 6 hours in the first 14 days. The feed that disappears is always the 2 a.m. one, and 1 skipped feed turns a 4-hour schedule into a 9-hour gap; 2 lost feeds a day is 30-35% of intake, which shows on the scale 48 hours later as a flat line, not a screaming kitten.
Volume: 5-10 mL is a starting band, not a lifetime rule
Daily intake runs 20-25% of body weight, split across 6 feeds. At 100 g that is 5-7 mL a feed, at 150 g it is 8-10 mL, at 200 g it is 12-15 mL. The 5-10 mL band covers the first 14 days for most kittens; after that the ceiling moves with weight, and a vet should confirm the new figure at the 14-day check. Gain is the only honest check. Expect 7-10 g a day in week 1 and 10-15 g from week 2, weighed at the same time daily, before a feed, on the same scale, because a 2 g gap between two scales looks exactly like a week of failure.
Temperature in 3 places
Milk goes in at 38 C. Two degrees colder and gut motility drops, so the kitten takes 5 mL and keeps 3; above 45 C you risk burns in a mouth only 2 cm deep that cannot spit anything out. Test 3 drops on the inner wrist, not the back of the hand. The box is the second temperature: 30-32 C of surface heat in week 1, 28-29 C in week 2, 26-27 C by week 3, 24-25 C by week 4, with the heat under half the floor so a kitten can crawl off. The kitten is the third: rectal temperature 36.5-38 C. Below 36 C, warm first and feed later, because milk in a cold gut ferments and the risk of it going down the wrong pipe climbs with every attempt.
Stimulation: 6 sessions of 30-60 seconds
A kitten cannot urinate or defecate on its own for the first 2-3 weeks, so every one of the 6 feeds ends with 30-60 seconds of rubbing: warm damp cotton, 3-5 gentle strokes in 1 direction over the genital area, a pause, then repeat until the kitten finishes. Count the output instead of guessing. Expect 4-6 urinations and 1-2 stools a day, stool the texture of toothpaste and pale yellow. No stool for 48 hours, a hard dry pellet, blood in the urine or a distended belly that stays tight after stimulation are all vet calls, not wait-and-see items. Never rub hard to force a result: 10-15 seconds per side is enough.
The first 4 weeks in 1 table
| Age | Weight | Feeds per day | mL per feed | Surface heat |
|---|---|---|---|---|
| Day 1-7 | 90-150 g | 6, every 4 h | 5-7 | 30-32 C |
| Day 8-14 | 150-250 g | 6, every 4 h | 8-10 | 28-29 C |
| Day 15-21 | 250-350 g | 5, every 5 h | 10-14 | 26-27 C |
| Day 22-28 | 350-450 g | 4-5, every 5-6 h | 14-18 | 24-25 C |
Read the table by weight, not by calendar day. A runty kitten in a litter of 5 can sit 10-14 days behind its siblings and still be normal; that same kitten on the day-22 row at day 14 is being overfed. The 5-18 mL swing across 4 weeks is a 3.5-fold change, so no single volume fits a whole litter.
4 numbers that mean a vet today
Any 1 of these ends home monitoring for the day:
- Weight loss above 10% of body weight in 24 hours, or 2 flat days in a row.
- Rectal temperature under 36 C, or a kitten that feels cool to the touch at the paws and ears.
- No stool for 48 hours, or 12 hours with no urine.
- Resting breathing above 60 per minute, or milk bubbling from the nose after a feed.
Milk from the nose is the emergency on that list: it means aspiration, and a kitten can go from noisy breathing to pneumonia in 24-48 hours. Stop feeding, keep it warm and upright, and have a vet listen to the chest the same day.
Powder, cow milk and the recipes to refuse
Cow milk carries 3-5 times the lactose of queen milk and a kitten has the enzyme for queen milk only, so gas, diarrhea and dehydration follow inside 12-24 hours; goat milk is no fix at 4.1% lactose. A replacer mixed to its label, usually 1 part powder to 2 parts water by volume, dissolved at 40-45 C and cooled to 38 C, is the only home option worth using. Never microwave a bottle: 20 seconds creates hot spots 10-15 C above the average. Refuse recipes with raw egg white, cod liver oil or condensed milk; anything beyond the replacer is a vet decision, not a forum post.
Weaning at 21-28 days and the 3 checkpoints
Between day 21 and 28, offer replacer in a shallow dish and warm wet food thinned with replacer; by day 35-42 most kittens take 4 small meals of solid food plus 1-2 milk feeds, and the bottle is gone by week 6-7. Three checkpoints matter more than that schedule: 48 hours for weight and hydration, 14 days for eyes, umbilicus and the weight curve, and 6-8 weeks for the first vaccine and a fecal check. Hand-reared kittens miss 4-6 weeks of maternal antibodies, so the vaccine series is a conversation with a vet before the kitten meets anyone; what the queen should have been screened for before this litter is in pre-breeding tests.
What to do tonight
- Set 6 alarms 4 hours apart and log the mL taken, not the mL offered.
- Weigh daily before the first feed; 2 flat days is the earliest warning you get.
- Hold the box at 30-32 C in week 1, heat under half the floor, and re-check the surface every 4 hours.
- Stimulate 30-60 seconds after every feed and note urine and stool counts on the same chart.
- Book the 48-hour and 14-day checks now, and let a vet set any change in volume or interval.
Frequently asked
How much milk should a 100 g kitten get per feed?
About 5-7 mL, 6 times a day, which is 20-25% of body weight over 24 hours. The 5-10 mL band covers most kittens for the first 14 days; after that the volume moves with weight and a vet should confirm the new figure at the 14-day check rather than you scaling it up by eye.
Can I feed a kitten every 6 hours to sleep through the night?
Not in the first 2 weeks. A newborn stomach empties in 2-3 hours and 6 feeds a day is the minimum, so pushing to 6 hours drops you to 4 feeds and about 30% of intake. If night feeds are impossible, split the load with another person or ask a vet about a 3-hour daytime schedule that keeps 6 feeds in 24 hours.
Why does my kitten refuse the bottle when the milk is the right temperature?
Check the kitten before the milk. A rectal temperature under 36 C shuts down digestion, and a kitten that cold will not suck reliably no matter how warm the bottle is. Warm the kitten first, then try 3 drops on the inner wrist, and let a vet look at any kitten that refuses 2 feeds in a row.