Here is my predicament. Three weeks ago three of my five hens went broody. They live in two different pens. I was anxious to hatch my first chicks so I ordered some eggs on-line. I simultaneously changed one of the nesting arrangements to make it less of a shelter and more of a nesting box. The day they arrived I put some eggs in each of the nesting areas. The brooding hen that did not have its nesting box changed immediately took to sitting and has now been on them 9 days (I am going to candle soon). But the other two hens would not sit on the eggs. Several nights went by and they still would not sit on them so I changed their entire nesting area back to how it was in the first place thinking they just were not comfortable with the change. But they still won't sit. It has now been 9 days and I keep thinking if they sit on them soon it will still be OK. Our weather has been decent in that time period with lows in the mid 20s and highs in the mid 40s and 50s. So how much more time do I give them? As best as I can tell they are not laying any eggs so I think they are still kind of broody. The only other thing that comes to mind is I switched them from straw to wood shavings so I will change that back tonight. But can I leave the eggs in there for 2 weeks? 3 weeks? 4 weeks? How long before they are no longer viable?