I feel like not a lot of people are properly educated on this topic, and it seems like something super simple that also seems like common sense, BUT....
Please don't feed newborn kittens and/or cats milk from a cow or any other animal rather than a cat as it will cause digestive issues. Most cats are what we call "lactose intolerant" because they can't produce the digestive enzyme "lactase".
Here is an article about the topic....
https://www.pdsa.org.uk/what-we-do/b...them%20poorly.