Powdered cat milk replacer (such as Cimicat) can be purchased from the vet clinic, major pet stores, or on the Internet. Another good milk replacer is KMR. This is the cat equivalent of infant formula, with the same composition as queen's (mother's) milk. The milk replacer has guidelines as to how much to feed in each meal. Do not feed cow's milk to the kitten as the lactose is likely to upset the kitten's stomach. If you have no milk replacement and a hungry kitten, offer some cooled boiled water in a dropper or syringe until you can get to the vet clinic or pet store. The water keeps the kitten hydrated and won't upset her tummy. You can purchase this at a vet clinic, a major pet store, or on the Internet. In an emergency use an eyedropper or a small syringe to drip the milk replacement into the kitten's mouth. You do this much as you would a baby: hold the kitten up straight against your shoulder, or place one hand under its belly. Gently pat and rub its back. Before and after each feed, wipe the kitten's bottom with a paper towel or gauze pad soaked in warm water. This stimulates the kitten to go to the toilet, which otherwise she would not do. Hold the kitten over a litter box and use the towel to rub the kitten's genitals and anal region after every meal. Continue to do this until the urination and defecation is over (when nothing else is coming out).  Rub in just one direction–rubbing back and forth is irritating. Cotton balls or pads are not recommended because they shed. Urine should be pale yellow and odorless, and stools should be yellowish-brown, formed in tiny logs. Dark, pungent urine is a sign of dehydration; green stool may be a sign of over-feeding, while white stool could indicate malabsorption, a serious problem. Call your vet if you have any concerns.  If the kitten does not urinate for 12 hours, take her to the vet's immediately. Most kittens poop once a day, but individual schedules vary. Take her to the vet's if she hasn't pooped in more than two days. In the first two weeks of life the...

TL;DR in Vietnamese:
Cho mèo con uống chất thay thế sữa. Sử dụng bình sữa dành cho mèo con kèm theo núm vú thiết kế đặc biệt. Kích thích mèo con ợ hơi sau mỗi bữa ăn. Kích thích mèo con bài tiết chất thải. Tìm dấu hiệu chất thải khỏe mạnh. Thực hiện theo lịch trình bữa ăn của mèo con. Giữ ấm cho mèo con bằng miếng đệm nóng kín đáo. Không cho mèo con đang lạnh bú sữa, Nếu thân nhiệt của mèo con hạ thấp, bạn cần sưởi ấm cho chúng từ từ. Tìm hiểu thêm về chăm sóc mèo con mồ côi.