Training to eat from Grandpa's Feeder

[flowers4me22]

My chickens aren't eating from the treadle feeder (Grandpa's Feeder) we introduced them to, it's been 2 days now...does anyone have any tips?

 

[Below frigid]

Prop it all the way open and put a few meal worms on the step and a few in with their feed in the feeder.leave it that way a few days . Ground squirrels figured it out too!