I got some mandarin eggs last year..8 of them. I've researched them quite a bit and know they're harder to hatch than most, but i have hatched runners, cuyoga, and buffs as well as pekin so I thought I'd give it a shot. The eggs are much smaller than the other duck eggs. I had great luck with my other breeds in my incubator. I have a great incubator..it's digital and maintains the exact temperature. I watched the humidity..i candled them and they were growing really well..and then..they just stopped for no reason so I know they're hard. I'll try again next year. I also know from research that they are hard to get to eat, but i talked to someone who raises them and she said she gets a pillow and drops the duckling about 6 inches onto the pillow and for some reason they start eating after that..it stimulates them for some reason.