Lactation peaks in week 3, not week 1, and that is when most queens fall behind. From day 14 to day 21 after birth a nursing queen may need 2 to 3 times her resting calories and 60 to 100 mL of water per kg per day, while a litter of 4 to 5 kittens pulls 400 to 600 kcal out of her every 24 hours. Miss that window and she mobilises body fat, drops 10 to 15 percent of her weight, and milk volume falls with it.
The demand curve, week by week
Week 1 is cheap. Milk output is still small, most queens eat 1.2 to 1.5 times maintenance, and they lose the 0.5 to 1.5 kg of fluid and placental weight gained during gestation. Week 2 climbs to about 1.8 times maintenance. Week 3 to week 4 is the summit at 2 to 3 times, and it stays there until the kittens begin eating solid food at 4 weeks. By week 6, with weaning under way, demand slides back to roughly 1.5 times. A queen fed once a day in week 3 will not eat enough in one sitting; split the ration into 4 meals and leave dry food down between them.
Feed against the calorie math, not the bowl
Maintenance for a 4 kg queen is about 240 to 280 kcal a day, or 60 to 70 kcal per kg. Multiply by 2.5 at peak and you get 600 to 700 kcal a day. Kitten food runs 4.0 to 4.5 kcal per gram, so that is 140 to 175 g of dry food daily, or 100 g of dry plus 100 to 130 g of canned. Read the label before you trust the scoop: foods between 3.5 and 4.5 kcal/g are normal, and a formula at 3.5 kcal/g needs roughly 30 percent more weight on the scale than one at 4.5 to deliver the same energy.
Two habits matter more than the exact number. Weigh the food, because a 250 mL cup of dry food varies by 20 to 30 percent between brands. And weigh the queen twice a week on the same scale: a loss of more than 2 percent of body weight in 7 days means she is in deficit, whatever the bowl looks like.
Water: 60 to 100 mL per kg per day
Milk is about 80 percent water, so a queen producing 100 to 150 mL of milk a day is losing 80 to 120 mL of water before she maintains herself. At 4 kg the target is 240 to 400 mL of drinking water a day on top of her food. Offer 3 bowls in different rooms, refresh them 2 times a day, and add 1 to 2 tablespoons of warm water to canned food if intake is low. Track the litter box instead of guessing: 3 to 5 urine clumps a day is normal on wet food, and fewer than 2 clumps in 24 hours over 2 days deserves a same-week call.
Six checks that catch trouble early
Run these 6 items on a fixed schedule. The kitten weights are the fastest signal, because milk supply drops 24 to 48 hours before the queen looks thin.
| Check | How often | Normal range | Act when |
|---|---|---|---|
| Queen weight | 2 times a week | Within 2 percent of week-1 weight | Down more than 2 percent in 7 days |
| Kitten weight | Daily, same hour | Gain 10 to 15 g per day in weeks 1 to 3 | No gain for 2 days, or any loss |
| Water intake | Daily | 240 to 400 mL at 4 kg | Under 200 mL for 2 days |
| Mammary glands | Daily, all 8 | Soft, warm, milk present on all 8 | Hot, hard, purple, or painful to touch |
| Rectal temperature | Daily for 7 days | 38.1 to 39.2 C | 39.5 C or above, or below 37.5 C |
| Stool and appetite | Daily | Formed stool, 4 meals eaten | Diarrhoea over 24 hours, or 1 meal refused |
Free choice from week 2, weaning from week 4
Switch to free-choice feeding between day 10 and day 14, before the peak arrives, so the queen never has to ask. Keep kitten formula rather than adult food from week 4 of gestation through weaning; the extra 15 to 20 percent protein and 1.1 to 1.3 percent calcium are what milk is built from. Introduce gruel at 4 weeks, offer it 4 times a day, and expect weaning to take 3 to 4 weeks. Dry the queen off gradually: cut the ration by about 25 percent per week from week 7, and stop milking her out, which only restarts production.
When the queen needs a vet
A fever of 39.5 C or higher with a hot, firm gland is mastitis until proven otherwise, and it can progress to abscess in 24 to 48 hours. Muscle tremors, twitching, a stiff gait or panting in the first 3 weeks of lactation point to low blood calcium, which is a same-hour emergency rather than a supplement problem you solve at home; the article on eclampsia in lactation walks through the signs in order. Refusal to eat for 24 hours carries a separate risk in a fat queen, because hepatic lipidosis can start within 2 to 3 days. Feeding detail by trimester sits in queen nutrition in pregnancy and lactation.
Set the week up in 30 minutes
Five moves on day 1 cover most of the risk:
- Put a kitchen scale next to the nest and weigh all kittens at the same hour daily, logging grams in a notebook.
- Divide the daily ration into 4 portions and write the times on the lid of the food bin.
- Place 3 water bowls, 1 of them a fountain, and mark the fill line with tape so intake is visible.
- Book the week-3 weight check and the 6-week weaning review in the calendar now.
- Cost the extra 4 to 6 weeks of kitten food before the litter arrives, using the feeding cost calculator.
The single number to remember is 2.5. A queen eating 2.5 times her normal ration in week 3, drinking 60 to 100 mL per kg, and holding weight within 2 percent is on track; anything else is a signal to weigh, not to wait.
Frequently asked
How much should a nursing queen eat in week 3?
Roughly 2 to 3 times her resting calories. For a 4 kg queen that is 600 to 700 kcal a day, or 140 to 175 g of kitten food at 4.0 to 4.5 kcal per gram. Split it into 4 meals and leave dry food down between them, because a queen cannot eat that volume in one sitting.
Why is my queen drinking so much water while nursing?
Milk is about 80 percent water, so a queen producing 100 to 150 mL of milk a day loses 80 to 120 mL of water before her own needs are met. A 4 kg queen should drink 240 to 400 mL daily. Offer 3 bowls, refresh them twice a day, and add warm water to canned food if intake stays low.
When does low milk supply become an emergency?
When kittens stop gaining for 2 days or lose weight, or when the queen runs a temperature of 39.5 C or above with a hot, firm mammary gland. Both need a vet within 24 hours. Muscle tremors or a stiff gait in the first 3 weeks point to low blood calcium and need help the same hour.