My hens have been broody for 3-4 weeks each and it looks like almost all of their eggs have gone bad, although I don't know why. Could it be the hens keep switching who has which nest? There are 6 broodies in 5 nests. They almost all went broody within a day or two of each other. Any who I have 4 baby chicks that hatched at work on Tuesday and wondered if anyone has been successful switching out bad eggs for live chicks? The moms are three banty cochin and a d'uccle. The last d'uccle just started sitting last week so I won't try it with her. What do you all suggest?