I'm sorry birddoggy, but I'm not politically correct and the last source I'd look for on such things is the Border Patrol. They can't keep wetbacks out of the country so how are they going to know how to kill ticks. Perhaps if you could lay a hide out flat, 24 hours MIGHT be enough, but a tick in the center of a rolled out hide will be at room temperature at the 24 hour mark. It's funny that you can't IMPORT hides into America from Africa and South America unless they've been "dipped". And I'm simply NOT going to pick up a damned tick infested hide and carry it to the freezer without spraying it down with permethrin.