If you need to feed baby kittens without a mother, you should use kitten milk replacer (or KMR), which comes in either liquid or powder form and is formulated for cats. You can purchase the formula, bottles, and nipples over the counter at most pet supply stores. For the first week of life, kittens need to be fed about every two to three hours, and after that, you can usually stretch it out to every four hours. Most kittens can be weaned off formula between four and six weeks of age. If you dont have access to kitten formula, you can feed the kitten a few drops of warm treated milk to prevent dehydration. However, cows milk should never be given to kittens. When feeding the kitten, you should use a bottle, syringe, or dropper. Its important to monitor the kittens weight and adjust the amount of formula accordingly. Additionally, orphaned neonatal kittens need help urinating and defecating, which a mother cat would normally do with her rough tongue. Without the mother, you can use a warm, damp cloth to gently stimulate the kittens genital area.