I have a question.. I have been milking one of my does since May. I always use the strip cup to discover anything that is not "normal". She has never had any issues! But I bought 2 more milking does and they in their drying up phase. So first time milking them this morning and the one out of the two had tiny little white balls of milk left on top of rhe screen of my strip cup. What does this mean? Is it mastitis? Or is this normal? Original owner said she had never had mastitis. She is six years old. Is her milk ok to drink?