I am of the opinion that you aren't going to be doing much of attracting that which isn't already there. I have tried corn, sweet feed, soured corn, jello corn, various fruits and vegetables and 3 commercial attractants. I have done, corn, soured corn, and jello corn in deep post holes. Oh, and there was molasses and creosote telephone poles. I know I have tried some other stuff, but can't recall what.
Despite the testimonials of numerous hunters (in person, online, and vouched for in ads for commerical products), I have never had hogs come charging out of the woods for the yummy treats I set out within minutes of doing so. Regardless of how sensitive a hog's nose is reported to be, there isn't any magical elixir that when put out causes hogs to come running. I know several folks will claim that hogs came immediately after putting our their special mix of whatever and maybe it really happened, but it probably wasn't the magical mix.
I can't think of a single example where such stuff has been applied and produced fast results that it wasn't applied at a location already frequented by hogs for food. So if hogs did show up after putting it out, more than likely the hogs were already in the area, already going to check out the feeder anyway because they know that food is going to be there with some regularity.
If you see any of the hunting shows where they hunt hogs with bait and are doing product endorsements for attractants (such as in the Hog Man tv series) note they they always are using their special products at locations where they have already been feeding hogs. When the hogs come in, the TV personalities always talk about what a good job the attractant did to make the hunt a success. That is bogus. Notice that they never put that stuff in some random location far away from any feeder and have hogs show up immediately. Not that those guys often return to the blind with the remaining product with them and the hogs never show up at the blind looking for the commercial attractant.
I have shot 4 or 5 hogs in the last 3 years within minutes of getting arriving at my stand and feeder where simple corn was being used. In one case, I arrived after dark, scanned the area with night vision to see if any animals were feeding, saw none and climbed into my stand, got settled, and within a minute of getting in the stand, did another NV scan and 5 hogs were under the feeder. Last September I showed up to my stand at midnight, immediately starting hearing chew noises, shot a hog below and behind my stand and was calling my wife at 12:05 to announce my success. Last Spring, I was checking my feeder on the way to my stand when a sounder walked in on me and didn't seem too bothered that I was there until I started shooting.
If we used these events to indicate a successful hog attactant, then I am apparently a hog attractant because hogs often show up within minutes of my arrival. That sounds pretty silly, no? Yet I have the experience and have documented this happening. Who could argue with such results?
With Double Naught Spy hog attractant, however, the same parameters apply as with the other attractants. Hogs are showing up at locations where they know food to already be. It isn't the special attractant, but just coincidental timing between the hunter and the hogs. If you hunt a baited location enough times that hogs do visit, sooner or later you will have very short hunts like I have had and it has nothing to do with special products.
When you listen to folks talking about hog attactants and how well they work, notice that such folks aren't always successful despite their claims of great hog attraction. A buddy of mine had noted that hogs had not hit his feeders for a while and so he had sat many nights with no luck and he was "breaking out his secret mix." If a hunter has a secret mix that truly works, why would the hunter ever NOT use it? Why would they go more than one hunt of not using it and not being successful before using it?
Special secret formula sour, jello, etc. corn and other attractants are more about the hunter than the hogs. It is not that much different than primitive society pre-hunt ceremonies conducted such that the hunters will be successful. As westerners, we think pre hunt ceremonies involving dancing, chanting, ritual markings, etc. to be self deceptive as we know that dancing around, chanting, etc. isn't actually going to cause the game to behave differently. Special recipes are a lot like that as well.
So what have I learned from using such attractants?
Deer, raccoons, and ants love soured and jello corn too. Lots of animals and bugs like molasses. Hogs like this stuff too, but if they don't get there before the other animals eat it, then they don't get any. Post hole soured corn put out in the middle of a food plot doesn't work nearly as well as post hole soured corn put close to a feeder. I have two such post holes with sour corn in my food plot right now and despite the reported amazing capabilities of a hog's nose, none have dug up either cache despite having had hogs pass through the food plot several times now. So in other words, soured corn under a feeder or post hole soured corn near a feeder appears to attract hogs, but only because they were going to the feeder anyway.
My creosote telephone poles that I had hoped the hogs would use for rubbing are unbothered and growing weeds around them.
Fruits and vegetables were often consumed by other animals long before hogs ever arrived. Strangely, even when the hogs did arrive and I had pumpkins and pumpkin sections near the feeder, they completely ignored the pumpkins.
Lots of animals like sweet feed. The big problem with sweet feed in motorized feeders is that the sweet feed soaks up moisture and swells into a gooey mess. Blowing rain soaking your spinner pan with sweet feed on it can cause the feed to swell with moisture and the moisture will then get carried up the chute tube and clog the feeder. Sweet feed on the ground when it rains will swell up and dissolve into the ground, the feed being lost for consumption. Sweet feed is best used in dry conditions only.
Oh and Grim Reaper Wildlife Attractant that has various videos showing hogs running in to a feeder within minutes of application actually does more to repel animals than attract them. I tested some and watched deer keep a 2-3 yard distance between themselves and the spot I had treated and they would not eat the corn within that zone. I sent some to a buddy over at WildHogHunters.com and he tested a feeding spot they used for 2 or 3 weeks, using a game camera to monitor results, not returning to the location during the test weeks. Zero hogs showed up and it did not seem beneficial to attracting other game either.
Bottom line...regular corn works great. Lots of food products will work just fine if the hogs know there is an available resource consistently at a given location. You can spend whatever time you want making special secret recipe mixes and the hogs may love it, but know that your effort, time and expense of making such mixes probably isn't going to do much more for having hogs show up than just by using corn. Don't spend your money on commercial attractants, not unless you have the money to spare and it makes you feel good about supporting the employees of the company that makes it.