How to Care for Orphaned Kittens Less Than Three Weeks of Age
To care for orphaned kittens less than 3 weeks of age, feed them every 2-3 hours with powdered cat milk replacer heated to 95 degrees F. After feeding the kittens, you'll need to wipe their genitals with a damp cotton swab to encourage them to urinate. Additionally, clean the kittens' fur in short strokes with a damp cloth when they've finished eating. You should also wash your hands before and after handling the kittens so you don't get them sick.
Learn how to handle the kittens. Always take care to wash your hands before and after handling the kittens. They may be carrying diseases or be susceptible to germs and bacteria that you've picked up. When you do pick up the kittens, pick them up carefully. Always check to make sure they feel warm, by seeing if the pads of their feet feel cold. Chances are, they'll start crying if they're cold. If you have other pets, make sure to keep them separate from the orphaned kittens for at least 2 weeks. Don't let them share litter boxes, food, or water bowls, since these could spread disease. Keep them warm. Neonatal kittens (under 2 weeks old) cannot regulate their body temperature and usually keep warm by snuggling up to the mother. Since they can't do this, get a heating pad designed for puppies or kittens. Place the kittens on the heating pad, making sure to avoid direct contact with the pad if there's no fleece cover on it. If there's no cover, wrap a towel around it. Kittens should never be directly exposed to the heating pad, since they may get localized burns or overheat. You can also use a hot water bottle wrapped in a towel, but check it frequently to make sure it's still warm (around 100 degrees). Make a soft bedding spot. Place a box or cat carrier in a quiet, isolated part of your house. The room you put it in should be warm and draft-free, away from any other pets. Set a towel inside the box to make a cozy spot for the kittens to rest. You should also cover the box or carrier with a towel to keep it warm. Make sure not to cover air holes in the box or cat carrier to prevent suffocation. Keep the kittens together. You don't need separate boxes or carriers for each kitten. Place them all in the same soft bedding spot. This will also help keep them warm and comforted. Ensure that there is enough room for the kittens to move around. For instance, the kittens should be able to move to the edges of a heating pad if they're starting to overheat. Buy powdered cat milk replacer. Buy powdered cat milk replacer, like Cimicat, from the vet clinic, major pet stores, or the internet. This is the cat equivalent of infant formula, with the same composition milk from the kittens' mother. Do not feed cow's milk since the sugar, or lactose, will likely upset the kittens' stomachs. If you don't have milk replacement and the kittens are hungry, offer some boiled water that has been cooled. Use a dropper or syringe, until you can get to the vet clinic or pet store. The water keeps the kittens hydrated and won't cause upset stomachs. Prepare to feed the kittens. Sterilize the bottle and nipple in boiling water, then let them cool completely on a clean towel. Mix up the milk replacement formula using a little whisk to get the lumps out. You should warm the milk up to 95 - 100 degrees before feeding it to the kittens. As a final check, drip a few drops onto the underside of your wrist to make sure it's not too hot. Always make sure the kittens themselves are warm before feeding them. Never feed a kitten whose temperature is less than 95 degrees. This could cause aspiration pneumonia which makes it difficult to breathe and may even be fatal. Correctly position the kittens and bottles for feeding. Never hold a kitten and feed it like a human baby. Instead, keep the kitten's feet down and it's head straight, as though she's nursing from her mother. Hold her by the scruff of her neck and place the nipple into the side, then center of her mouth. The kitten will adjust it till it's comfortable for her.Let the kitten control the suction from the bottle. Don't squirt or force the milk into her mouth. Don't forget to burp the kittens after feeding. Burp the kittens like you would a human baby. Place a kitten on your chest, lap, or shoulder and gently rub and pat her back with 2 fingers until she burps. If a kitten is having trouble latching on, hold the kitten's face and don't let her move her head. Try to feed her again and squirt just a few drops of milk out. She'll probably latch on. Feed the kittens frequently. You'll be able to tell a kitten is hungry if she cries and wiggles around like she's hunting for a nipple. The kittens will feed every 2 - 3 hours around the clock during the first 2 weeks of life. It's best to use a kitten feeding bottle that has a specially designed kitten teat (made by Catac). Follow the guidelines on the package of milk replacer to determine how much to feed in each meal. A full kitten often falls asleep while suckling and has a rounded belly. In an emergency, use an eyedropper or a small syringe to drip milk into the kitten's mouth. After 2 weeks, the feeds can be stretched out to to every 3 to 4 hours, with a gap of 6 hours overnight. Help the kittens eliminate feces and urine. Normally, the mother licks the kittens' genitals after each feed which causes them to pass feces and urine. Before and after each feed, you'll need to wipe the kitten's bottom with a cotton pad soaked in warm water. This stimulates the kitten to go to the toilet, which she cannot do without stimulation until she is a few weeks old. Place the kitten on a clean blanket and turn the kitten on its side. Use the moistened cotton pad to rub the genitals in one direction, not back and forth which could cause friction. You'll notice the kitten begin to urinate or defecate. Keep rubbing until the kitten stops or she may not completely eliminate. The kittens' urine shouldn't smell and should be pale yellow in color. Feces should be yellowish brown. If you notice white or green feces, or dark urine that smells strongly, the kittens may be dehydrated or need medical attention. Clean the kittens. Once you've fed and helped the kittens eliminate, you'll need to clean them. Take a warm damp cloth and stroke the kittens' fur using short strokes. Be sure to towel dry the kittens until they're completely dry and place them back in their soft warm bedding. If you notice dried feces are stuck on a kitten's fur, gently dip the kitten's bottom into a bowl of warm water. Then you can carefully wipe the loosened feces off with a cloth. Checking the weight of the kittens. Kittens should steadily gain weight throughout their first few months. Make sure to weigh each kitten at the same time every day and record their weights. Kittens usually double their weight one week after birth. They should keep gaining about half an ounce each day after the first week. If a kitten stops gaining weight, or is losing weight, there is something wrong and it may need to see a vet. For example, kittens are usually born weighing around 3.0 - 3.7 ounces (90 - 110 grams). Around 2 weeks old, a kitten should weigh around 7 ounces. By 3 weeks old, the kitten should weigh about 10 ounces. Know when to take the kittens to the vet. It's a good idea to take the kittens to the vet as soon as possible to let the vet check for dehydration, worms, parasites, and assess their general health. Some veterinarians' offices may even offer a free visit if you tell them you're caring for rescued kittens. You should also know when to take young kittens to the vet for medical treatment. Take the kittens to the vet if you notice: A high or low temperature (over 103 or under 99 degrees) Lack of appetite (if a kitten hasn't eaten at all in a day, get emergency medical attention) Vomiting (if it's constant, get emergency medical attention) Weight loss Coughing, sneezing, discharge from the eyes or nose Diarrhea (if it's constant, get emergency medical attention) Lack of energy Bleeding of any kind (get emergency medical attention) Difficulty breathing (get emergency medical attention) Any trauma, like being hit by a car, dropped, limping, stepped on, unconscious (get emergency medical attention) 
Learn how to handle the kittens. Keep them warm. Make a soft bedding spot. Keep the kittens together. Buy powdered cat milk replacer. Prepare to feed the kittens. Correctly position the kittens and bottles for feeding. Feed the kittens frequently. Help the kittens eliminate feces and urine. Clean the kittens. Checking the weight of the kittens. Know when to take the kittens to the vet. 