i used to think if it smelled really nasty its good stuff. but ive seen a afew shows and articles now where top of the line scent makers said estrous scent is actually very sweet and nice smelling. if it smells bad its cause its a mix or has gone bad. old scents have worked for me but ive noticed does and also bucks not rutting hard will sometimes spook or get weary when smelling it. just thought id pass it on since it seems like it could really help to know it.