i herd the growl the other day and got to see its effect. i saw 6-10 bucks chasing one doe and a huge 8 had her but the little bucks kept at it but then he did the growl and chased one or two away and they really kept there distance until he started leaving. i would only use it if youve got a big buck not interested in grunts and bleats, it could scare him if hes small or been beaten up lately.