I wouldn't expect Cayenne to work with deer. It's on the soil and my puppy gets a sniff and then rubs his face with his paws and starts rooting a bit on the ground - just like he does when he gets blasted by a skunk. My past experience with using it never worked, but I decided to try it again. I think it would have to be stuck to the foliage to have an effect on deer and I think taste buds are really a different matter than inhaling it. I'd expect that puppy to scarf it right down the gullet if it was applied to a piece of bacon! If I could get some Scorpio pepper powder, I might try using some kind of sticker with it for foliage, but it would be for the tree squirrels to see if it would work. They do persist in tasting things.
