Ok...fair enough....change the wording from "significant and sudden" to "massive decline"....I think Ski's point was EHD can cause a significant decline in a localized deer herd...especially given the number of drought periods we've experienced in recent years...I've read several reports from Perry and Hickman countys from JCDeerman and others where EHD knocked their deer numbers way down in previous years....just a possible explantion and a discussion about what your experiencing.