Hi,I have seen them work on chickens and the also worked well on ducks,you have to scold them first,with ducks you have to add washing up liquid to the scolding water.From what I understand they go through a lot of the plucking fingers that are expensive.
The only problem with these machines is all that scolding you loose the quality of a dry plucked bird,there is also a problem with shelf life as the skin is basically now cooked.I would say these machines and scolding are fine if you want to mass process a load of young 7 or 8 week old broilers,which you just kill,pluck,gut then sell immediately or in the freezer.
But for big cockerels and turkeys I like to dry pluck them,then hang them for a week to 10 days before gutting then selling or eating.
I think as a goose is a to money bird its all about quality and that can only be acived with dry plucking,followed by waxing.I just haven't cracked how to do it correctly or quickly yet.
Graham.