Look on some of the Texas hunting forums about Double Down feed. They (DD) make some pretty outlandish claims on their product. I think the deer DO eat the snot out of it though, increasing cost to you to keep feeders filled.
also look at DD videos of hunting, they do kill some monsters, not sue how much is because of the feed or because they let the deer go to 7-8 years old before shooting. All in south Texas.
We are planning to let our deer reach 5+ if possible. I have also reached out to some average guys like myself that have been feeding the DD. The cost between my current choices and DD is insignificant, so I figured I’d give it a try.