Sniff them????My eggs are day 3 today. I set them on Monday lunchtime so counted it as day zero. I will candle day 7 as development is very clear by then and I am in Slovenia for the weekend anyway so won't be tempted to candle until Monday anyway
We are in Italy, but I am English. I am married to an American and we lived in upstate New York for a few years before moving here. We've been in Italy for a little over two years, but have now bought a house here and expect to stay for another 5 years which is the longest we'll have ever stayed in one house!
Where are you in Australia? I've only ever passed through - went to New Zealand twice, but have never stayed in Australia longer than it takes to change planes - hope to one day though...
Some experience with the Marans...particularly the very dark ones, black copper marans. Never hatched a wheaten maran. The dark ones are hard to candle so if you can't see much just sniff them regularly and hope for the best.

Your day 7 will be my day 5 by the sounds of it, so will be candling around the same time. It sounds funny at this end to hear someone casually say they will "be in Slovenia for the weekend". But that would probably just be like me traveling interstate for the weekend here. I live in New South Wales in the Blue Mountains. Lived in Queensland for a long time but my husband and I moved back home for work and family-raising! Sounds like you have to move around quite a bit... how do you manage the Chooks? Do you give them away and then start up again in the new location?