Welcome Goatober!
In order to make cheese, animals on the farm must be producing milk. And to make milk, mothers must be giving birth and having many babies, consistently.
In the case of goat dairies across America, the birth of a male goat creates a dilemma for the farmer: there is no established good market for goat, so male goats are usually sold at birth onto the commodity market where their quality of life significantly diminishes or they are disposed of before their time, thus the reason for No Goat Left Behind.