Cayenne Pepper: Sprinkle it generously all over your lawn or flowerbeds. You can also mix it with the cayenne pepper to create a spray with a double whammy. Horse Manure: It’s not only good for improving your lawn but for keeping dogs away. Sprinkle generously over your lawn.Click to see full answer. In this way, does cayenne pepper keep dogs from pooping in your yard?Hot peppers are a well known approach to deterring dogs from relieving themselves where you don’t want to step in it. The idea of this instructable was to help keep the pepper in place–if you just sprinkle Tabasco sauce or cayenne powder, it’s likely to wash away (if it’s rainy) or blow away (if it’s not).One may also ask, will cayenne pepper kill my lawn? Spices. Dogs don’t like spices, which are biodegradable and harmless to the lawn. Sprinkle black or cayenne pepper or chili powder around the edges of your lawn in moderate quantities. Dogs generally sniff around on the grass and the spices will cause irritation to their nostrils and deter them from going any farther. Simply so, does cayenne pepper keep dogs away? Cayenne Peppers Though cayenne peppers will not harm your dog, it will irritate its eyes, nose and throat. A good trick for getting your dog to avoid the upholstery is to sprinkle cayenne pepper in your potpourri or leave a bowl of ornamental chilies next to the sofa. Vinegar Dogs strongly dislike the odor of vinegar.What can I spray on my lawn to keep dogs away?To keep dogs off your lawn, try spraying a mixture of water and baking soda on your lawn, which will neutralize the smell of dog urine so that dogs are less likely to come back. You can also spray your lawn with vinegar to keep dogs away, but use it sparingly since it might damage your plants.