I have a small Whitetail deer farm and we are gathering urine now and will continue to though the season as it sells. It's fresh and Not mixed with several deer it is from one single deer. I keep them all seperated and bottle each one indiviually. No science here just the real thing , not gathered in July and package for sale in the fall This is the real deal fresh mimacking what is happening in the wild now. Can be picked up here at the farm for $10.00 per 2 ounce bottle or for another 2.00 I will mail it to you.