This was their first experience with chickens. They came from a family member that raises them and had given them 5 they weren't there 24 hours before all but one died. I didn't read about the vanilla so I just dragged my son outside to spray some around the coop and on them. At least till the morning when I can maybe go get something to spray from tractor supply to spray their coop down with.
The vanilla extract will only work as long as the scent lasts which isn't long. We got some permethrin (?sp). Mix and spray birds and yard. It works.