Vital Max feed is high quality feed for your deer and elk herd. go to vitalmaxfeed.com and look at their line. I have been using Vital Max feed for quite some time with excellant results over the seasons. The current production that they are making contains heat stress technology. What in the world is heat stress technology???????? Is anyone currently dealing with heat stress in this heat and humidity in Oklahoma???? What if the deer and elk could dilate your veins to circulate more blood thru your body to transfer more heat out??? Wouldn't the animals be cooler, not to mention moving more nutrients throughout their bodies to help with rack development and lactation?? Now you are starting the get the concept. The deer are stressing like we are. I understand the compound that is being used in this feed and how it works. I do not know of another feed that uses this additive. I am having a pallet brought in to OKC of the Vital Max with HST. A 50# bag is $25.00 and is an introductory price. If anyone is interested send me a private message.