I've found that Hens generally get Toms to stall and hold tight.... they KNOW that the laws of nature will attract and lure the lone Hens to him.... thats what all the gobbling and strutting is about. To reverse this law of nature is often times very rare or just very lucky.

By adding the male decoys, you add some competition and make the Gobbler feel that he needs to step up his game to get the Hen before another suitor breeds her.

My best results, and the same decoy spread that put half a dozen Gobblers down for us this season (all killed from 6 to 18 yards), was a upright Hen with a semi-strut Jake and a full strutter. Every bird came in, circled the Jake a few times and then moved on to the Stutter to face it.