Unlike a human baby, a goat kid is born without antibodies. Goat kids obtain antibodies from colostrum. You read more about colostrum and its alternatives in this blog.
Gut flora consists of hundreds, sometimes thousands, of different types of bacteria that contribute to the growth, development and immunity of the animal.
Bottle raising kid goats reduces the spread of disease from mother to baby. To allow bottle-fed young to grow in the most natural environment possible, many goat keepers give colostrum replacements.