Back when we hunted the Gifford Pinchot alot the elk typically got fired up right after the first cold snap. When the nights were frosty and they days could still reach the 70's. Same with the East side. Once the nights get considerably cooler than the day they know it's time to start getting "horned up" as we would say. My sheep and goats are starting to stink already as well. Just a little though.