I was scooping poops tonight when I found a small amount of a white milky substance on the fleece. I have never seen this before. Do girls secrete anything when they are in heat? (one of my girls has been in heat for the last few days). Is it something I should be concerned about? Also, how often do girls go into heat? I have never seen Bella have a heat cycle yet but Lexi has had 3 in a month.