Hmmm... any one else noticed this? A few days ago, while cleaning my mare's udders, she was excreting a noticeable amount of clear serum from both teats--I could "milk" her and fill my palm. A couple days later, she was dry. I clean her udders regularly, and while I've noticed an occasional drop or two, it's never been anywhere near this amount. I asked some other mare owners, and they've never seen that happen in their mares. I've been hunting around online, but most of the references I've found to maiden mare's udders excreting serum involve udder infections, and include discolored discharge, heat, and painful swelling, none of which she had. One article by a vet said he's seen maybe four or five mares in his practice with this, and it was believed to be spring grass and hormones. Well, she has been getting more hand grazing lately and the boys were eyeing her that day....