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I agree, I've seen posts on here and know people locally that use cabinet incubators. Most people (on here and locally) who hatch goose eggs in their cabinet incubators don't give the goose eggs any special treatment. I've recently started doing this with ducks and I'm having much better results. They can hatch perfectly at 35% humidity just like the chicken eggs do. (35% is not intentional, but I've had several hatch in my 'incubator' rather than the hatcher. The incubator is kept between 25% and 35% humidity).
I've recently been giving some thought to humidity and its role in incubation... And I believe that most very experienced hatchers, generally those that handle exotics because they are far more expensive and valuable and thus, more thought is given to the process of incubation, consider humidity to be a value based primarily upon the thickness of an egg's shell. I think, generally, a goose egg has many characteristics that sort of create a balance... Difficult to explain, but when you think about it, a goose egg is a large egg, which means there is more moisture to be lost. The egg shell is also very much thicker, which means moisture is not as rapidly lost through the pores of the egg. But the incubation period is longer, allowing for greater moisture loss. Put it all together and, at a modest humidity, it should all balance out to create a weight loss percentage similar to those seen in other species, like chickens... I think it would probably be best for people who are incubating small quantities of valuable eggs (whether valuable in terms of actual cost or valuable to the individual) should invest in a scale and just weigh their eggs throughout the incubation process. I had really good luck doing this once for myself. But I find that RH% varies even from one goose breed to the next. Tried to incubate a wild breed of goose with domestics and the wild ones had very much trouble. I believe their shells were significantly thicker. So, it varies. It's complicated. But, better humidity be lower than higher.
