This mild urine formula simply blows away deer urine in a bottle, period! It will never shy does or smaller deer away. Use it mainly in scrapes and/or scent trails. It works on a deer"s urine attraction anytime of year. Bucks or does commonly over-mark it with their own urine or feces. BF-Pre/Post Rut can be used to condition deer into frequenting an area. For opening day results, we suggest starting your synthetic scrapes in the spring or summer, but first time setups often produce quick responses within 24 hours.