One of my hens started a set on April 19. After 24 days no babies. I pulled those eggs, she was determined to set so I gave her another batch and moved her to a private place all to herself, (I thought maybe they didn't hatch the first time because the other hens kept getting in with her.) Well it is 27 days since I put the new batch under her and nothing. I know my roo is doing his job because his fave's are all naked on there backs. I know he is fertile, we have several of his offspring. There is no sound from the eggs, and I am not very good at candleing them. hhheeeeeellllpppp please. Should I give her some more because she still seems so determined