They started hatching early, which is a sign I had my temperature too high, so I need to get a thermometer to double check my incubator's settings. Early hatching and too high a temperature can be associated with malformed chicks and sticky/bloody navels, but I seem to have escaped that, phew!
On Thursday, when I filled up the water reservoir, I heard a little 'peep' so I opened up the lid and could see that a couple of the eggs had little pip holes in them and some of them were chirping at me and rocking! I turned up the humidity to the max it would go (70%) to help keep their membranes soft and left them to it.
I go quilting on Thursday night and my husband rang me there and told me, "There's this noisy little bird flopping round in the incubator!" I didn't rush home straight away, but must confess I was a little tempted! I left it in there overnight to fluff up and by the morning it had been joined by three more.
I had to go to work but saw two more hatch before I left. I had transferred the fluffed up ones into the brooder box by then. They had a heat lamp, food and water and I crossed my fingers that they would be okay.
I needn't have worred! Chicken babies are incredibly self-sufficient (unlike the blasted turkey poults).
By the time I got home, there were only a few to go. My son got to watch one hatch, although he got a little inpatient.
So all in all, I have 13 little bundles of fluff running around in the brooder. I set 21 eggs, removed 4 infertile ones on candling at day 10 and had a couple of uncertains and 13 ended up hatching. Not too bad but if I work on getting my temperature more accurate, I hope I will get even better hatch rates. My rooster's fertility isn't top notch either but he is trying to get around 10 ladies ;)