I have raised literally hundreds of kids on cow's milk. Raised quite a few on replacer too when I had a lot of kids and was, for whatever reason, short of milk. When I got some Jerseys my kids got cow milk and the calves got goat milk. Both the calves and the kids did great. Feeding the cow milk to the kids saved me the work of pasteurizing the goat milk in order to prevent the transmission of CAE to the kids from the raw goat milk. Calves don't get CAE. The only time I ever ran into trouble was sometimes the milk from my Jerseys was a little too rich for the kids so I occasionally I had to dilute it a bit. Since Boers tend to produce a richer milk than most dairy goats I wouldn't think that would be a problem in any event As for the comment that people who are opposed to using replacer feel that way because they have had no experience using it, is simply not true. Many people, including me and a lot of people on this list, who don't like raising kids on replacer feel the way they do because they HAVE had a lot of experience using it. Some kids do fine on replacer and some don't. The only reason to use replacer at all is for economic reasons. Replacer is usually cheaper than milk, but with the premium replacers made especially for kids that isn't true either. When you are raising just a few kids, the cost difference is not really an issue. In any event, mixing the cow milk half and half with goat milk will prevent digestive upsets, if any.