I have a dozen vorwerk eggs arriving in a couple days. After the trip and resting a day or so, what else can I do to get a decent hatch. I get 60 - 90% hatches usually but can I make it better for this bunch? I want a yard full of these and they have been very hard to source. Everything else is healthy and well, so I gather these should be likewise? Are they wierd or is it just me??