We had a big drop in temps last night/this morning. I was wondering if big changes can affect the girls output. They're not down a lot .. about a cup or two each. I thought that was a bit odd that both were down at the same time. That's why I was wondering if it is weather related. Also, I may be rather obsessed about the amount they give. They are each giving a half gallon plus a cup or two every morning. I guess I really don't know how much they should vary in their output. Or, why it varies, except for in the case of mastitis or something. Any clarification is helpful. Thanks!