I have a cage feeder like that one and it works great – I have had it so long that I don’t remember if it took some time or not. Don’t remove the top, as that defeats the purpose of the feeder, which is to exclude the large birds. I believe they will get the hang of it – give them some time – they won’t want to miss out on those tasty worms, but don’t feed them outside the feeder – make them go in.
