I bought a flock of four pullets and a young roo (some sort of Faverolle/Legbar/Silkie crosses) at a poultry sale on the weekend. Just one pullet is laying; she gave us four eggs last week. I put them in the incubator and the first two developed for a few days and quit. I know absolutely nothing about these birds; the person selling them didn't even own them. Are very young pullet eggs less viable? Could the issue be nutritional? She would have been forming these eggs while still at her original home. They are now in 8 inch deep grass full of bugs, eating high quality feed and starting to take a liking to my home cooked lentil/spinach/corn mush. Do you think I should keep trying, or let her mature more? They are an interesting looking/pretty little flock and I would like some chicks from them.