I have been using trail cams for several years and currently have a Camtrakker branddigitalwith the "strobe" flash. This has got to be one of the brightest flashes on the trail cam market, and in several thousand photos, I have never had a picture of anything, hog, deer, coon, fox, stray dog, crow, etc, show any sign of fear from the camera or flash. This has been proven to me because I set my photo trigger at the fastest rate for follow up pictures and have literally gotten 50 pictures of a deer or group of deer eating at a corn pile or inmy food plots in a matter of minutes. I am sure thatthere have beensome circumstances of trail cams "scaring" deer, but I would bet the sound of the camera has more to do with the problem than the flash. I believe this is a bigger problem with film cameras than digitals. My 2 cents.