When you have a Grade A dairy you need a lot of goats to have enough milk to make cheese and other goat milk products. A lot of goats mean 60-80 (or more) mama goats which are called Does. Each doe can have 1-4 goats with the average being 2 each freshening (birthing).
If we had that many kids running around the barn/field they would wander off, drown in water troughs, other does are “not so nice to them” ram them, corner them, hurt them, etc.
Even with twins, the kids inevitably nurse off of one teat, they become familiar with that teat, I would be going around nursing the other teat so the doe doesn’t get mastitis. We would not know how much the kids were drinking if they were on their dams. When bottle-feeding the kids, we know they are getting the proper amount of colostrum and milk to set them up for a lifetime of health and happiness. Bottle-raised goats are friendlier and bond with humans better. When I sell goats I give you the bottle and the nipple they are using so you can continue the bonding process at your home.
We can take much better care of the kids in the baby goat nursery and know the amount of colostrum/milk they are receiving, and take care of the moms at the milk barn. After birthing (freshening) each doe gets warm electrolyte water, grain, beets, alfalfa pellets, fresh hay, and special attention until she passes her placenta, then she is rejoined back with the herd.
The kids grow up in the nursery, graduate to the teenager field, graduate to the backfield, grow up to breeding weight/age, get bred then come to the milk barn to have their kids. They then rejoin their original herds. It’s not uncommon to have a mom, daughter, and granddaughter come into the stanchion all next to each other. The circle of life.