Someone did the research that I was also very curious about. I have found goats milk to work very well for our kittens this season. It’s easy on the stomach, doesn’t clump up, Kittens love it, and you can buy it at Walmart. I did get some flack from others who advised me about the lack of Taurine in goats milk. This article helps show that goats milk has just the right amount of Taurine for kittens.
https://www.kittyblog.net/2018/06/should-you-feed-kittens-goat-milk.html?m=1