If you need to feed baby kittens without their mother, you should use kitten milk replacer (KMR), which comes in either liquid or powder form and is formulated for cats. Here are some steps to follow:

1. Purchase KMR, a kitten feeding bottle, a syringe, and a dropper from a pet supply store.
2. Warm the KMR to body temperature by placing the bottle in a bowl of warm water.
3. Fill the bottle with the appropriate amount of KMR based on the kittens weight.
4. Hold the kitten on its belly on a warm towel on your lap.
5. Gently ease the nipple into the kittens mouth.
6. Let the kitten suckle at its own pace.
7. Feed the kitten every two to four hours, depending on its age.
8. After feeding, use a warm, damp cotton ball or cloth to stimulate the kittens genitals and anal area to help it urinate and defecate.

Its important to note that you should never feed a kitten cows milk, human milk replacement, or puppy milk replacement, as these can cause diarrhea and dehydration. Additionally, you should monitor the kittens weight gain and overall health, and consult with a vet...