I'll use it for deer, with great results, but a deer's nose has nothing on a canine's. The trick with deer is doing a TOTAL scent reduction regimen, including using a washcloth and towel washed in scent free detergent/baking soda and air dryed (along with all your gear and clothing)on a clothesline. I won't wear any hunting clothes in my truck, and change when I get to my hunting area and change again before driving home. All gear is stored in sterile containers. I'll move slow going to stand to avoid sweating. I have a separate toothbrush for hunting and brush with baking soda and floss prior to every hunt. Heck, I even avoid spicy foods during bow season. Even after all that, I'll only hunt a stand when the wind is right, but occasionally a deer will still get downwind. A few get a tiny whiff, but believe I'm too far away to be a threat. By then, I'm drawn back and have a pin on their ribs. It may be extreme, but I have a pile of big racks as a reward for my efforts- all bowkills. None were taken before I started getting serious about scent control. If you tryed this for predators you'd still get busted and might get in three stands a day. My .02 /ubbthreads/images/graemlins/grinning-smiley-003.gif