I have been 12 times without seeing any as well before, it happens. not what you wanted to hear I know. example of going with something other than the norm. I always like to use adult cottontail, pup distress, female whimper, etc. that has worked before. just the other day after an hour set, getting furious had some turkeys talking in the distance so I decided to mess with them and try to get them to come in. did some yelps and five minutes later had a pair coming right in. another example is numerous times had the foxpro whaling and coyotes were hung up wouldn't come in, I try the mouth call and most times on a string they will commit. I don't know what it is diff sound, pitch who knows but has definitely worked when the other was not. I am having real good luck with mouth calls right now. as stated above if you can practice on a mouth call then try it hunting, I believe it will compliment your foxpro