I can tell you with all honesty, that I know ants hate it. You'll have to read my cycling journal going through Sweden though to find the proof.
We have a pair of nesting cardinals that come to snack on it pretty regularly over the past 2 years, along with the juveniles when they are learning to fly and fend for themselves. I do have a variety of seeds out for them (they love sunflower seeds especially) that are from commercial birdseed and we have a bird bath (AKA drinking trough for all the critters) so I guess they are keeping a handle on the sodium intake. I don't know if cardinals are smarter than chickens or not? The bluejays like it too, though they like the peanuts in shell the best. Even the woodpeckers, who I always thought ate only bugs, will come down to peck at it and have a few seeds as well.
