I had a little d'uccle hen go broody over a week ago. She has been setting on 4 eggs for the last week. When I went to the barn a minute ago she had gotten off the nest today and apparently gotten back in the wrong nest box. She was sitting on 3 eggs that were layed today in a different box and the 4 she's been on for the past week were cold. I put her back on the original 4 and she went right back to setting on them. Do I need to toss those 4 and give her some different ones since those felt cold or could they still hatch?? I've got plenty more fertile eggs but I just hate for her to start all over again.