I've seen a few pigs at close range take a bit of notice on an IR light, but they were maybe 30-40yds from me. They didn't spook, but definitely looked at me for a few seconds. I've also seen several big hogs that had previously spooked off a green weapon-light take zero notice of an IR beam in their faces at 70+ yards.
Animals you hunt with IR can and will see your 850nm light.
If you are spooking animals with it, switch to a 940mn... (In many cases, it just requires a swap of the interchangeable light source, and not the entire light.)
