She could have mastitis or she could be a precocious milker. Try to milk out some of the fluid. If it looks like pus it is obviously mastitis and she will have to be treated. Is the udder hard, sore, or hot? If it is that would make me suspect mastitis. Mastitis can be spread to young unbred animals by flies.
Just so you know, a precocious milker is an animal that comes into milk without being bred. It isn't all that common, but it isn't exactly rare either. I once knew a Saanen doe that gave a gallon of milk day in and day out even though she had never in her life been exposed to a buck. Occasionally you will have a buck that is a precocious milker. I have had more milking bucks than I have had precocious milking does. Precocious milkers. whether buck or doe, need to be milked out. Otherwise they can get mastitis and end up very sick and even dead.
Holy cow!!!! (Or goats. )
That's so weird.
Who knew that could even be a thing??!!
Thank you for the info.