There is no single recommendation on number of goats per acre because an acre in Idaho is not the same as an acre in Arizona or Florida. In fact, my acres are not even the same as someone a couple miles down the road from me. Also, goats are not grazers like
cattle, so if you have an area with brush or baby
trees, they'll love that way more than a pristine pasture! Goats are pretty adaptable, and I know a family in Chicago that has three milkers in their
city yard. Of
course, they are feeding
hay year round, but it works, and they get fresh
milk year round.
If I'm understanding your post correctly, that's pretty amazing that your mom was able to find a goat that would let a calf nurse! I wouldn't count on being able to do that reliably. Most goats will not let another kid nurse, so another species is really unusual. Also, calves are VERY rough on the udder. We also have had a few cattle over the course of 10 years or so, and I'd be worried about a calf damaging a goat's udder and/or teats, and you could wind up with mastitis. This is actually one of the arguments you hear for cow dairies removing calves at birth, but it doesn't happen nearly as often with goats. In fact, I've never had it happen with 450 kids born here.