Well...here at Pest Control Everything consider ourselves experts on mostthings related to pest control. Most...but not all. Deer repellents tend to fall into the category of not all for us. So while we can in fact provide direct access to some of the more commonly used deer repellencies on the market, we are unable to provide much additional insight into their variable efficacies. At least for now. We'll provide updates as our areas of expertise continue to expand.